Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

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Only approved publications

34730 Publications

Die besondere Rolle der seltsamen Quarks in Kernen und Kernmaterie

Dohrmann, F.

  • Lecture (others)
    Physikalisches Kolloquium der Technischen Universität Dresden, 22.06.2004, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10027
Publ.-Id: 10027


Productions of antikaons in p+Au and p+C collisions

Dohrmann, F.

  • Lecture (Conference)
    DPG Frühjahrstagung, 10.03.2004, Köln, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10026
Publ.-Id: 10026


Testing new time of flight detectors at ELBE: Status report

Dohrmann, F.

  • Lecture (Conference)
    CBM Collaboration Meeting, 13.02.2004, Darmstadt, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10025
Publ.-Id: 10025


In-beam PET for hadron therapy using LSO/APD-array detectors

Crespo, P.

  • Lecture (Conference)
    41th General (Open) Meeting of the Crystal Clear Collaboration, CERN, 29.09.2004, Geneva, Switzerland

Permalink: https://www.hzdr.de/publications/Publ-10024
Publ.-Id: 10024


In-situ monitoring with PET: Suppression of random coincidences during in-beam PET measurements

Crespo, P.

  • Lecture (Conference)
    ENLIGHT Workpackage 5, 06.06.2004, Paris, France

Permalink: https://www.hzdr.de/publications/Publ-10023
Publ.-Id: 10023


Quasi-particle model for deconfined matter

Bluhm, M.

  • Lecture (Conference)
    Strangness in Quark Matter 2004, 15.-20.09.2004, Cape Town, South Africa

Permalink: https://www.hzdr.de/publications/Publ-10022
Publ.-Id: 10022


BUU calculations for K+, K− and φ production for proton-nucleus collisions in the GeV region

Barz, H. W.

  • Invited lecture (Conferences)
    International Workshop on Hot and Dense Matter in Relativistic Heavy-Ion Collisions, 24.-27.03.2004, Budapest, Ungarn

Permalink: https://www.hzdr.de/publications/Publ-10021
Publ.-Id: 10021


Contribution of the nucleon-hyperon reaction channels to K− production in proton-nucleus collisions

Barz, H. W.

  • Lecture (Conference)
    DPG Frühjahrstagung, 08.-12.03.2004, Köln, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10020
Publ.-Id: 10020


Experimental evidence for chirality in the odd-A Rh-105

Timar, J.; Joshi, P.; Starosta, K.; Dimitrov, V.; Fossan, D.; Molnar, J.; Sohler, D.; Wadsworth, R.; Algora, A.; Bednarczyk, P.; Curien, D.; Dombradi, Z.; Duchene, G.; Gizon, A.; Gizon, J.; Jenkins, D.; Koike, T.; Krasznahorkay, A.; Paul, E.; Raddon, P.; Rainovski, G.; Scheurer, J.; Simons, A.; Vaman, C.; Wilkinson, A.; Zolnai, L.; Frauendorf, S.

High-spin states in Rh-105 were populated by the Zr-96(C-13,p3n) reaction at beam energies of 51 and 58 MeV, and studied using the EUROBALL IV gamma-ray spectrometer and the DIAMANT charged particle array. A pair of nearly degenerate DeltaI = 1 three-quasiparticle bands with the same spins and parity have been observed. Comparison of the experimental results with tilted axis cranking calculations confirms the chiral character of the two bands, while arguments based on the excitation of particles within the pig(9/2)nu(h(11/2))(2) configuration of the yrast band and comparison with the previously observed gamma band exclude the other possible interpretations. This is the first experimental evidence for three-quasiparticle chiral structure in the A similar to 100 region, and the first simultaneous observation of a gamma band and chiral partner bands in one nucleus. (C) 2004 Elsevier B.V. All rights reserved.

  • Physics Letters B 598(2004), 178-187

Permalink: https://www.hzdr.de/publications/Publ-10019
Publ.-Id: 10019


Comment on "Electromagnetic dissociation of B-8 and the astrophysical S factor for Be-7(p,gamma)B-8"

Snover, K.; Junghans, A.; Mohrmann, E.

Recently, Davids and Typel recommended a "low" value of S-17(0) based on fits to published direct and Coulomb dissociation data, in which they excluded the precise result of Junghans We show that their statistical analysis is incorrect due to a substantial underestimate of the experimental uncertainties, and that there is no reason to exclude the Junghans result based on statistical arguments.

  • Physical Review C 70(2004), 39801

Permalink: https://www.hzdr.de/publications/Publ-10018
Publ.-Id: 10018


Chiral bands in Rh-105

Alcantara-Nunez, J.; Oliveira, J.; Cybulska, E.; Medina, N.; Rao, M.; Ribas, R.; Rizzutto, M.; Seale, W.; Falla-Sotelo, F.; Wiedemann, K.; Dimitrov, V.; Frauendorf, S.

The Rh-105 nucleus has been studied by in-beam gamma spectroscopy with the heavy-ion fusion-evaporation reaction Mo-100(B-11, alpha2ngamma) at 43 MeV A rich variety of structures was observed at high and low spin, using gamma - gamma - t and gamma - gamma - particle coincidences and directional correlation ratios. Four magnetic dipole bands have also been observed at high spin. Two of them are nearly degenerate in excitation energy and could be chiral partners, as predicted by Tilted Axis Cranking calculations.

  • Open Access Logo Brazilian Journal of Physics 34(2004), 999

Permalink: https://www.hzdr.de/publications/Publ-10017
Publ.-Id: 10017


Magnetic dipole and electric quadrupole rotational structures and chirality in Rh-105

Alcantara-Nunez, J.; Oliveira, J.; Cybulska, E.; Medina, N.; Rao, M.; Ribas, R.; Rizzutto, M.; Seale, W.; Falla-Sotelo, F.; Wiedemann, K.; Dimitrov, V.; Frauendorf, S.

The Rh-105 nucleus has been studied with the Mo-100(B-11, alpha2ngamma) reaction at 43 MeV incident energy. A rich variety of structures was observed at high and low spins, using gamma-gamma-t and gamma-gamma-particle coincidences and directional correlation ratios. A gamma-vibrational band was observed for the first time in this nucleus. A new structure based on the intruder 1/2(+)[431] proton orbital was identified. Four magnetic dipole bands have also been observed at high spin, three of which have negative parity and have similar characteristics: they are very regular in energy spacing, presenting nearly constant alignments and large values of B(M1)/B(E2) ratios. Two of them are nearly degenerate in excitation energy and could be chiral partners. The pig(9/2)xnuh(11/2)(g(7/2),d(5/2)) configuration is tentatively assigned for these bands, with the angular momenta of the proton and neutron intruders and the collective angular momentum aligning along the three perpendicular axes of the triaxial core, as predicted by tilted axis cranking calculations.

  • Physical Review C 69(2004), 024317

Permalink: https://www.hzdr.de/publications/Publ-10016
Publ.-Id: 10016


Vortex structures in the separated flow on an inclined flat plate under electromagnetic forcing: influences of excitation wave form, frequency, and amplitude

Weier, T.; Cierpka, C.; Gerbeth, G.

Wall parallel Lorentz forces have been used to excite the separated flow on the suction side of inclined symmetric hydrofoils. Resulting lift enhancements resemble those known from alternative active flow control methods. The controlled flow is characterized by a small number of relatively large vortices, which are related to the control mechanism. Consequently, time resolved flow fields have been analyzed by proper orthogonal decomposition and continuous wavelet transform to extract dominant features. Both evaluation methods highlight significant influences of excitation frequency, wave form, and amplitude.

Keywords: Proper Orthogonal Decomposition; Continuous Wavelet Analysis; Coherent Structures; Flow Control; Lorentz force

  • Lecture (Conference)
    5th International Symposium on Turbulence and Shear Flow Phenomena, 27.-29.08.2007, München, Germany
  • Contribution to proceedings
    5th International Symposium on Turbulence and Shear Flow Phenomena, 27.-29.08.2007, München, Germany
    Proceedings of the 5th International Symposium on Turbulence and Shear Flow Phenomena, 1105-1110

Permalink: https://www.hzdr.de/publications/Publ-10015
Publ.-Id: 10015


In-Medium Properties of Omega.Meson and Nucleon: QCD Sum Rules Approach and Rule of Four-Quark Condensates

Thomas, R.

  • Invited lecture (Conferences)
    Virtual Institute Workshop III, 16.10.2006, Rathen, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10014
Publ.-Id: 10014


In-Medium Change of Four-Quark Condensates: QCD Sum Rules Evaluation for Omega-Meson and Nucleon

Thomas, R.

  • Lecture (Conference)
    44. Int. Universitätswochen für Theoretische Physik, 12.03.2006, Schladming, Dtl.
  • Lecture (Conference)
    Frühjahrstagung der Deutschen Physikalischen Gesellschaft, 22.03.2006, München, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-10013
Publ.-Id: 10013


Omega, Nucleon, D Spectroscopy: QCD Sum Rules in Vakuum and Nuclear Matter

Thomas, R.

  • Lecture (Conference)
    37. Arbeitstreffen "Kernphysik", 08.03.2006, Schleching, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10012
Publ.-Id: 10012


FEL-induced Reflectivity changes in thin DNA-Films

Sczepan, M.

  • Lecture (others)
    Institut für neue Materialien, 12.06.2006, Saarbrücken, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-10011
Publ.-Id: 10011


Electromagnetic excitations in nuclei: from photon scattering to photodisintegration

Schwengner, R.

  • Lecture (Conference)
    Frühjahrstagung der Deutschen Physikalischen Gesellschaft, 20.-24.03.2006, München, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10010
Publ.-Id: 10010


Quenching of electroluminescence and charge trapping in high-efficiency Ge-implanted MOS light-emitting silicon diodes

Nazarov, A.; Osiyuk, I.; Sun, J.; Yankov, R.; Skorupa, W.; Tyagulskii, I.; Lysenko, V.; Prucnal, S.; Gebel, T.; Rebohle, L.

Combined measurements of charge trapping and electroluminescence intensity as a function of injected charge and current have been carried out with the aim of clarifying the mechanisms of electroluminescence (EL) quenching in Ge-implanted ITO-SiO2-Si light-emitting silicon diodes. Good correlation between the negative charge capture in traps of small effective capture cross-sections (sigmat1 e=1.7x10-19 cm2 and sigmat2 e=4.8x10-20 cm2) located in SiO2, and the quenching of the asymmetrical EL line with a maximum intensity at 400 nm has been observed. Similar correlation between the electron capture in traps with extremely small effective capture cross-section (sigmat3 e=5x10-21 cm2) and the quenching of the EL line at 637 nm has been established. A quantitative model for the EL quenching has been developed, which takes into account the modification of the luminescent centers with subsequent electron capture at the newly generated trap! s. The model shows good agreement between simulation and experimental data. It also demonstrates that small effective capture cross-sections for electron charging during the EL quenching are determined by the probability of the luminescence centers (LCs) being disrupted, and enables one to estimate the Ge concentration associated with the EL at 400 nm.

Keywords: Silicon-based light emitter; ion implantation; rare earths; electroluminescence; Metal-Oxide-Silicon-based Light Emitting Diodes (MOSLEDs); hot electron injection; charge trapping

Permalink: https://www.hzdr.de/publications/Publ-10009
Publ.-Id: 10009


Dipole-strength distributions below the giant dipole resonance in 92Mo, 98Mo and 100Mo

Rusev, G.

  • Lecture (others)
    Institut für Kern- und Teilchenphysik, 19.10.2006, Dresden, Deutschland
  • Open Access Logo Wissenschaftlich-Technische Berichte / Helmholtz-Zentrum Dresden-Rossendorf; FZD-478 2007
    ISSN: 1437-322X

Downloads:

Permalink: https://www.hzdr.de/publications/Publ-10008
Publ.-Id: 10008


Phi-Mesons in C+C collisions at 2 AGeV

Kotte, R.

  • Lecture (Conference)
    Hades collaboration meeting, 25.-28.10.2006, Darmstadt, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10007
Publ.-Id: 10007


Quasi-particle perspective on critical end point

Kämpfer, B.

  • Invited lecture (Conferences)
    Critical point and onset of deconfinement, 02.-09.07.2006, Florence, Italy

Permalink: https://www.hzdr.de/publications/Publ-10006
Publ.-Id: 10006


Our interest on omega mesons

Kämpfer, B.

  • Lecture (Conference)
    OMEGA-Workshop, 19.-20.10.2006, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10005
Publ.-Id: 10005


Interpretation of HADES data

Kämpfer, B.

  • Lecture (Conference)
    Virtual Institute (III): Dense Hadronic Matter and QCD Phase Transitions, 15.-17.10.2006, Rathen, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10004
Publ.-Id: 10004


Dense and hot strongly interacting matter on the universe

Kämpfer, B.

  • Lecture (Conference)
    Seminar on IST, 12.09.2006, Lissabon, Portugal
  • Lecture (others)
    Seminar FSU Jena, 01.06.2006, Jena, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10003
Publ.-Id: 10003


Quasi-particle perspective on equation of state and critical end point

Kämpfer, B.

  • Lecture (Conference)
    Quark Confinement and the Hadron Spectrum VII, 02.-07.09.2006, Ponta Delgado, Portugal

Permalink: https://www.hzdr.de/publications/Publ-10002
Publ.-Id: 10002


Impact of 4-quark condensates on in-medium effects of hadrons

Kämpfer, B.

  • Lecture (Conference)
    Quark Confinement and the Hadron Spectrum VII, 02.-07.09.2006, Ponta Delgado, Portugal

Permalink: https://www.hzdr.de/publications/Publ-10001
Publ.-Id: 10001


Heavy ion reactions at ultrarelativistic energies from hot deconfined matter to hadronic freeze-out

Kämpfer, B.

  • Lecture (Conference)
    ECT* Workshop, 26.06.-21.07.2006, Trento, Italy

Permalink: https://www.hzdr.de/publications/Publ-10000
Publ.-Id: 10000


On the effect of discretization in HELIOS 1.9

Merk, B.; Koch, R.

Study on the discretization effects in HELIOS 1.9 on teh basis of a single cell calculation

Keywords: Neutronics; HELIOS; Discretization; Neutronflux

  • Lecture (others)
    Studsvik 2007 UGM, 31.05.-01.06.2007, West Palm Beach, United States

Permalink: https://www.hzdr.de/publications/Publ-9999
Publ.-Id: 9999


Physics of high baryon density, Presentation of the chapter "In-medium modifications of hadrons"

Kämpfer, B.

  • Lecture (Conference)
    ECT* Workshop, 05.05.-02.06.2006, Trento, Italy

Permalink: https://www.hzdr.de/publications/Publ-9998
Publ.-Id: 9998


Quasi-particle model of QCD matter and a family of equations of state

Kämpfer, B.

  • Lecture (Conference)
    ECT* Workshop, 21.-25.03.2006, Trento, Italy

Permalink: https://www.hzdr.de/publications/Publ-9997
Publ.-Id: 9997


Exclusive virtual bremsstrahlung

Kämpfer, B.

  • Lecture (Conference)
    HADES-Meeting, 04.-08.04.2006, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9996
Publ.-Id: 9996


Medium modifications of hadrons: chiral condensate and more

Kämpfer, B.

  • Lecture (Conference)
    HADES-Meeting, 04.-08.04.2006, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9995
Publ.-Id: 9995


Electromagnetic probes of strongly interacting matter

Kämpfer, B.

  • Lecture (Conference)
    HADES-Meeting, 04.-08.04.2006, Dresden, Deutschland
  • Lecture (Conference)
    Workshop on In-Medium Hadron Physics, 11.11.2004, Gießen, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9994
Publ.-Id: 9994


D mesons and the chiral condensate

Kämpfer, B.

  • Invited lecture (Conferences)
    PANDA-Meeting, 20.06.2006, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9993
Publ.-Id: 9993


Pulsed ion-beam induced nucleation and growth of Ge nanocrystals on SiO2

Stepina, N. P.; Dvurechenskii, A. V.; Armbrister, V. A.; Kesler, V. G.; Novikov, P. L.; Gutakovskii, A. K.; Kirienko, V. V.; Smagina, Z. V.; Groetzschel, R.

Pulsed low-energy (200 eV) ion-beam induced nucleation during Ge deposition on thin SiO2 film was used to form dense homogeneous arrays of Ge nanocrystals. The ion-beam action is shown to stimulate the nucleation of Ge nanocrystals when being applied after thin Ge layer deposition. Temperature and flux variation was used to optimize the nanocrystal size and array density required for memory device. Kinetic Monte Carlo simulation shows that ion impacts open an additional channel of atom displacement from a nanocrystal onto SiO2 surface. This results both in a decrease in the average nanocrystal size and in an increase in nanocrystal density.

  • Applied Physics Letters 90(2007)13, 33120

Permalink: https://www.hzdr.de/publications/Publ-9992
Publ.-Id: 9992


Dipole strength below and above particle thresholds - new data and new ideas

Grosse, E.

Dipole strength below and above particle thresholds - new data and new ideas

  • Lecture (others)
    WS Nucl. Astrophys., 11.12.2006, Brüssel, Belgien

Permalink: https://www.hzdr.de/publications/Publ-9991
Publ.-Id: 9991


Emergent phenomena in mesoscopic systems

Frauendorf, S.

Emergent phenomena in mesoscopic systems

  • Lecture (Conference)
    Colloquium, National Superconducting Cyclotron Laboraty/Department of Physics, 17.11.2006, Michigan, USA

Permalink: https://www.hzdr.de/publications/Publ-9990
Publ.-Id: 9990


Emergent phenomena in mesoscopic nuclear systems

Frauendorf, S.

Emergent phenomena in mesoscopic nuclear systems

  • Invited lecture (Conferences)
    Key note talk, Mini-symposium on Nuclei as Mesoscopic Systems, The Annual Meeting of the Division of Nuclear Physics of the American Physical Society, 25.-28.10.2006, Nashville, USA

Permalink: https://www.hzdr.de/publications/Publ-9989
Publ.-Id: 9989


A closeup of the spinning nucleus

Frauendorf, S.

A closeup of the spinning nucleus

  • Invited lecture (Conferences)
    Nuclear Structure '06, Conference on nuclei at the limit, Pollard Technology Conference Center, 24.-28.07.2006, Tennessee, USA

Permalink: https://www.hzdr.de/publications/Publ-9988
Publ.-Id: 9988


Dynamical and static chirality of rotating triaxial nuclei

Frauendorf, S.

Dynamical and static chirality of rotating triaxial nuclei

  • Invited lecture (Conferences)
    Contemporary Frontiers in Nuclear Structure, American Chemical Society Meeting & Exposition, 26.-30.03.2006, Atlanta, USA

Permalink: https://www.hzdr.de/publications/Publ-9987
Publ.-Id: 9987


Bioactive composite ceramics in the hydroxyapatite-tricalcium phosphate system

Kubarev, O. L.; Komlev, V. S.; Maitz, M.; Barinov, S. M.

  • Doklady Chemistry 413(2007)1, 72-74

Permalink: https://www.hzdr.de/publications/Publ-9986
Publ.-Id: 9986


Free transverse vibrations of nano-to-micron scale beams

Xu, M.

In the present work, the integral equation approach and the non-local elasticity theory are employed to investigate the free transverse vibrations of nano-to-micron scale beams. The frequency equation is analytically formulated into an eigenvalue problem of a matrix with an infinite order. The numerical calculation is implemented by truncating this matrix to a finite order one. It is found that the impact of the non-local effect on the natural frequencies and vibrating modes is negligible for the beams with micrometre scale length. But when the length of beams reaches the nanoscale, the non-local effect becomes important; especially for the high-order natural frequencies and vibrating modes.

  • Proceedings of the Royal Society A 462(2006)2074, 2977-2995

Permalink: https://www.hzdr.de/publications/Publ-9985
Publ.-Id: 9985


Towards bio-inspired metal complexes for targeted radionuclide therapy

Juran, S.

kein Abstrakt verfügbar

  • Lecture (Conference)
    Supraphone meeting 2007, 31.05.-03.06.2007, Lipari, Italy

Permalink: https://www.hzdr.de/publications/Publ-9984
Publ.-Id: 9984


Effect of increase of radiation dose on local control relates to pre-treatment FDG uptake in FaDu tumours in nude mice

Schütze, C.; Bergmann, R.; Yaromina, A.; Hessel, F.; Kotzerke, J.; Steinbach, J.; Baumann, M.; Beuthien-Baumann, B.

Objectives:
To investigate whether heterogeneity in [18F]2-fluoro-2-deoxy-D-glucose (FDG) uptake in a single tumour line, i.e. in tumours with identical genetic background, relates to radiation response.

Materials and methods:
Sixty-two human FaDu head and neck squamous cell carcinomas in nude mice with a diameter of 7 mm entered the study. FDG-PET scanning was performed without anaesthesia on an animal PET scanner immediately prior to irradiation in order to determine maximum standardized uptake values (SUVmax). Single dose irradiations of 25 or 35 Gy were applied under normal blood flow conditions using 200 kV X-rays (0.5 mm Cu, ~ 1.2 Gy min-1). The mice
were observed for 120 days after irradiation, experimental endpoint was local tumour control evaluated using the
Kaplan-Meier method.

Results:
Analyzing all 62 animals, tumour control probability after irradiation with 25 Gy was significantly lower than after irradiation with 35 Gy (29% vs. 57%, log rank p = 0.016). Pre-treatment SUVmax values ranged from 0.72 to 3.47, the median SUVmax value was 1.59. In tumours with FDG uptake less than the median SUVmax, local control was 37% after 25 Gy vs. 47% after 35 Gy (p = 0.37). In contrast, substantial differences in local tumour control were found in tumours with FDG uptake above the median SUVmax (24% vs. 71%, p = 0.006). Multivariate Cox analysis revealed a significant decrease of hazard of recurrence with increasing dose and SUVmax.

Conclusions:
An increase of radiation dose had a greater effect on local control in FaDu tumours with higher FDG uptake than in tumours with lower FDG uptake. This supports the hypothesis that pre-treatment FDG-PET may provide
useful information for heterogeneous radiation dose prescription in subvolumes of tumours of individual patients. As only one tumour model was studied and single doses were applied, confirmatory investigations using further tumour models and fractionated radiotherapy are warranted.

Keywords: (18F]FDG; Positron emission tomography; Irradiation; Squamous cell carcinoma; Human tumour xenografts; Local tumour control

Permalink: https://www.hzdr.de/publications/Publ-9983
Publ.-Id: 9983


DNA-Backbone Dynamics Studied by Time-Resolved Infrared Spectroscopy

Fahmy, K.

DNA-Backbone Dynamics Studied by Time-Resolved Infrared Spectroscopy

  • Lecture (Conference)
    Inst. of Education and Research, 12.12.2006, Pune, India

Permalink: https://www.hzdr.de/publications/Publ-9982
Publ.-Id: 9982


Emittance Compensation of a Superconducting RF Photoelectron Gun by a Magnetic RF Field

Janssen, D.; Volkov, V.

For compensation of transverse emittance in normal conducting RF photoelectron guns a static magnetic field is applied. In superconducting RF guns the application of a static magnetic field is impossible. Therefore we put instead of a static field a magnetic RF field (TE - mode) together with the corresponding accelerating mode into the superconducting cavity of the RF gun. For a 3 _ cell cavity of the superconducting gun with frequencies f = 1.3GHz for the accelerating mode and f = 3.9 GHz for the magnetic mode and a bunch charge of 1 nC a transversal emittance of 0.5 mm mrad has been obtained. In this case the maximal field strength on the axis were Ez = 50 MV/m for the accelerating mode and Bz = 0.34 T for the magnetic mode.(This corresponds to Bs(max) = 0.22T on the surface of the cavity). Possibilities for the technical realization (input of RF power for the TE mode, tuning of two frequencies in one cavity, phase stability) are discussed.

  • Contribution to proceedings
    9th European Particle Accelerator Conference EPAC 2004, 05.-09.07.2004, Lucerne, Switzerland
    Contributions to the Proceedings, 9th European Particle Accelerator Conference EPAC 2004, MOPKF014, 92-9083-231-2, 330-332

Permalink: https://www.hzdr.de/publications/Publ-9981
Publ.-Id: 9981


Molecular switching in GPCRs: FTIR- and Fluorescence-Spectroscopyic Identification of Functional Modules in Rhodopsin

Fahmy, K.

Molecular switching in GPCRs: FTIR- and Fluorescence-Spectroscopyic Identification of Functional Modules in Rhodopsin

  • Lecture (Conference)
    Inst. of Technology Madras, 07.12.2006, Chennai, India

Permalink: https://www.hzdr.de/publications/Publ-9980
Publ.-Id: 9980


Der weiterbildende Masterstudiengang "Medical Radiation Sciences" an der TU Dresden

Enghardt, W.

Der weiterbildende Masterstudiengang "Medical Radiation Sciences" an der TU Dresden

  • Invited lecture (Conferences)
    Technische Fachhochschule Berlin, 12.12.2006, Berlin, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9979
Publ.-Id: 9979


Präzisionsbestrahlung auf der Basis biologischer Daten

Enghardt, W.

Präzisionsbestrahlung auf der Basis biologischer Daten

  • Invited lecture (Conferences)
    Präzisionsbestrahlung auf der Basis biologischer Daten, 07.01.2006, Leipzig, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-9978
Publ.-Id: 9978


In-beam PET in der Hadronentherapie

Enghardt, W.

In-beam PET in der Hadronentherapie

  • Invited lecture (Conferences)
    37. Jahrestagung der Deutschen Gesellschaft für Medizinische Physik, 21.09.2006, Regensburg, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9977
Publ.-Id: 9977


Application of the SUSA and CIAU methods to the calculation of a NPP start-up experiment using a coupled code system

Kliem, S.; Bousbia Salah, A.; Rohde, U.; D’Auria, F.

The modeling of complex transients in Nuclear Power Plants (NPP) remains a challenging topic for Best Estimate three-dimensional coupled code computational tools. This technique is, nowadays, extensively used since it allows decreasing conservatism in the calculation models and performs more realistic simulating and more precise consideration of multidimensional effects under complex transients in NPPs. Therefore, large international activities are in progress aiming to assess the capabilities of coupled codes and the new frontiers for the nuclear technology that could be opened by this technique. In the current paper a contribution to the assessment and validation of coupled code technique through the Kolzoduy VVER100 pump trip test is performed. For this purpose, the coupled REALP5/3.3-PARCS/2.6 code is used. The code results were assessed against experimental data and the overall data comparison shows good agreements between the calculations and the global kinetic and thermal-hydraulic aspects observed experimentally. Further investigations through the use of two “antagonist” GRS and the CIAU methods, in order to evaluate and quantify the origin of the observed discrepancies. It was revealed on one hand that relative error quantification discrepancies exist between the two approaches, and on the other hand deviations between code predictions and measurements are mainly due to the used models for evaluating and modeling of the Doppler feedback effect.

  • Lecture (Conference)
    First Workshop on OECD Benchmark for Uncertainty Analysis Modeling, 10.-11.05.2007, Paris, France

Permalink: https://www.hzdr.de/publications/Publ-9976
Publ.-Id: 9976


Der postgraduale Masterstudiengang "Medical Radiation Sciences" und die Ausbildung von Medizinphysik-Experten in Dresden

Enghardt, W.

Der postgraduale Masterstudiengang "Medical Radiation Sciences" und die Ausbildung von Medizinphysik-Experten in Dresden

  • Invited lecture (Conferences)
    12. Jahrestagung der Deutschen Gesellschaft für Radioonkologie (DEGRO), 27.05.2006, Dresden, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-9975
Publ.-Id: 9975


Visionen der Medizinphysik

Enghardt, W.

Visionen der Medizinphysik

  • Invited lecture (Conferences)
    12. Jahrestagung der Deutschen Gesellschaft für Radioonkologie (DEGRO), 25.05.2006, Dresden, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-9974
Publ.-Id: 9974


DYN3D/ATHLET Calculations of Exercise 2 – Influence of Coolant Mixing on the Power Behaviour

Kliem, S.; Kozmenkov, Y.; Höhne, T.; Rohde, U.

The results of the basic solution of the V1000 coolant transient benchmark obtained by means of the coupled code system DYN3D/ATHLET are compared to a variation calculation, where the coolant mixing is simulated using the CFD code CFX-5.

  • Lecture (Conference)
    V1000CT5 Workshop, 07.05.2007, Paris, France

Permalink: https://www.hzdr.de/publications/Publ-9973
Publ.-Id: 9973


Der postgraduale Masterstudiengang "Medical Radiation Sciences" in Dresden

Enghardt, W.

Der postgraduale Masterstudiengang "Medical Radiation Sciences" in Dresden

  • Invited lecture (Conferences)
    XVIII. Winterschule der DGMP, 14.03.2006, Pichel, Österreich

Permalink: https://www.hzdr.de/publications/Publ-9972
Publ.-Id: 9972


The Control System of Strahlungsquelle ELBE at Forschungszentrum

Leege, K.-W.

Technisches Seminar, DESY Zeuthen, 13.03.2007 Zeuthen

Keywords: Control System of Strahlungsquelle ELBE

  • Invited lecture (Conferences)
    The Control System of Strahlungsquelle ELBE at Forschungszentrum, 13.03.2007, Zeuthen, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9971
Publ.-Id: 9971


Second Dynamic AER Benchmark – Comparison of results

Kliem, S.; Rohde, U.

A three-dimensional hexagonal dynamic benchmark describing the ejection of a peripheral control rod in a VVER-440 core with neutron kinetics and simple adiabatic Doppler feedback. The initially critical reactor experiences a power excursion without any reactor scram. Nodal solutions are compared to a reference solution obtained with the fine mesh diffusion code CRONOS2.

  • Lecture (Conference)
    Annual Meeting of the AER Working Group D, 08.-09.05.2007, Paris, France

Permalink: https://www.hzdr.de/publications/Publ-9970
Publ.-Id: 9970


WP1: Development of PET/CT for oncology

Enghardt, W.

WP1: Development of PET/CT for oncology

  • Lecture (others)
    BioCare Meeting, EU FP6 Integrated Project Biocare, 08.-09.05.2006, Dresden, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-9969
Publ.-Id: 9969


In-beam PET for radiotherapy monitoring

Enghardt, W.

In-beam PET for radiotherapy monitoring

  • Invited lecture (Conferences)
    Conf. on Clinical and Experimental Research in Radiation Oncology, 24.01.2006, Les Menuires, France

Permalink: https://www.hzdr.de/publications/Publ-9968
Publ.-Id: 9968


Quasi-Particle Model for the EOS - critical point imaginary μ

Bluhm, M.

Quasi-Particle Model for the EOS - critical point imaginary μ

  • Lecture (Conference)
    Workshop des Virtuellen Inst., 16.10.2006, Rathen, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9967
Publ.-Id: 9967


QCD Equation of State in a Quasi-Particle Perspective

Bluhm, M.

QCD Equation of State in a Quasi-Particle Perspective

  • Lecture (Conference)
    Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus-Nucleus Collisions, Hot Quarks 2006, 15.-20.05.2006, Villasimius, Italy

Permalink: https://www.hzdr.de/publications/Publ-9966
Publ.-Id: 9966


Lattice QCD Based Equation of State - within a Quasi-Particle Perspective

Bluhm, M.

Lattice QCD Based Equation of State - within a Quasi-Particle Perspective

  • Lecture (Conference)
    DPG Tagung, 24.03.2006, München, Dtl.
  • Lecture (Conference)
    Int. Workshop on Hot and Dense Matter in Relativistic Heavy Ion Collisions, 09.04.2006, Budapest, Hungary

Permalink: https://www.hzdr.de/publications/Publ-9965
Publ.-Id: 9965


Graphite nanostructures in diamond produced by focused ion beam

Bischoff, L.; Heera, V.

There is a growing interest in graphite nanostructures since the discovery of exotic quantum properties of and the evidence for a field effect in few-layer-graphene (FLG) [1]. A promising method to produce mechanically stable and electrically isolated graphite nanostuctures is focused ion beam (FIB) implantation into diamond and subsequent annealing [2].
Graphite nanostructures with dimensions down to 100 nm, i.e. wires and electrodes including contact pads, which enable Hall and field effect measurements are produced by 30 keV Ga+ FIB implantation in a (100)- and (111)-oriented diamond surface followed by a subsequent annealing in the temperature range from 600° to 1500°C in vacuum. The structural quality and the electrical properties of the graphite nanostructures are investigated in dependence on the preparation conditions by means of AFM, SEM and electrical measuring techniques.
[1] K. S. Novoselov et al. Science 306, 666 (2004) and Nature 438, 197 (2005)
[2] A. M. Zaitsev and I. A. Dobrinet, phys. stat. sol. (a) 203, R35 (2006)

Keywords: FIB; diamond; graphite nanostructures; AFM; SEM; electrical properties

  • Lecture (Conference)
    E-MRS Spring Meeting, Symposium L, 28.05.-01.06.2007, Strasbourg, France

Permalink: https://www.hzdr.de/publications/Publ-9964
Publ.-Id: 9964


Renormalisation - from classical theory to quantum electrodynamics

Zschocke, S.

Renormalisation - from classical theory to quantum electrodynamics

  • Lecture (others)
    Universitet Bergen, 03.06.2005, Bergen, Norway

Permalink: https://www.hzdr.de/publications/Publ-9963
Publ.-Id: 9963


In-Medium Hadronic Observables: Impact of Four-Quark Condensates

Thomas, R.

In-Medium Hadronic Observables: Impact of Four-Quark Condensates

  • Lecture (others)
    Universität Bielefeld, 29.09.2005, Bielefeld, Deutschland
  • Lecture (Conference)
    VI Workshop, 08.10.2005, Prerow, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9962
Publ.-Id: 9962


Four-Quark condensates in QCD Sum Rules for Nucleons and Mesons

Thomas, R.

Four-Quark condensates in QCD Sum Rules for Nucleons and Mesons

  • Lecture (Conference)
    DPG Tagung, 04.03.2005, Berlin, Deutschland
  • Lecture (others)
    ITP, 06.06.2005, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9961
Publ.-Id: 9961


Gluon Radiation of Heavy Quarks in Deconfined Matter

Thomas, R.

Gluon Radiation of Heavy Quarks in Deconfined Matter

  • Lecture (Conference)
    Arbeitstreffen Kernphysik, 02.02.2005, Schleching, Germany

Permalink: https://www.hzdr.de/publications/Publ-9960
Publ.-Id: 9960


Investigation of ultra-thin layers by RF-GD-OES

Hoffmann, V.; Hübner, R.; Hecker, M.; Baunack, S.; Mattern, N.; Wetzig, K.; Grötzschel, R.

The continuous scaling down of the dimensions of Cu interconnect structures in microelectronics requires ultra thin barriers against Cu diffusion. Typically 10 nm thin films of pure, binary and ternary nitrides of refractory metals as Ta, TaN, TaSiN, WN are investigated to prevent effectively the Cu diffusion into the substrates. X-ray diffraction, depth profile analysis by glow discharge optical emission spectrometry (GD-OES), Auger electron spectrometry (AES) and Rutherford backscattering (RBS) and electron microscopy are used to correlate results of microstructure and phase characterization with diffusion phenomena [1-3].
The degradation of the barrier performance after annealing was controlled by depth profile analysis using GD-OES [4]. For each barrier composition a critical temperature was found above which a significant Cu concentration in the substrate occurred in the GD-OES signal. Apart from the Cu diffusion, also the onset of barrier material diffusion towards the surface could be traced by GD-OES. At GD-OES depth profiling of laterally inhomogeneous layers containing conducting as well as non conducting parts it became clear that focusing and defocusing effects of the sputtering ions exist.
Essential properties of these barrier layers, as electrical and thermal conductivity and resistivity against oxidation, are optimized by variation of the chemical composition. Phase formation and transformation or diffusion also depends strongly on the initial distribution of elements in the layer system. Therefore, an accurate quantification of the element concentration is needed for reliable production and thorough investigation. However, all applied methods have special advantages, disadvantages and limitations. With RBS, e.g., it is impossible to determine N and the layers must be deposited on C, but RBS delivers absolute concentrations without calibration. AES has an excellent lateral and depth resolution, but suffers from preferential sputtering and matrix effects and needs, as GD-OES, standard material for calibration. Therefore, only the combination of all could solve this requirement successfully.
[1] N. Mattern, M. Hecker, D. Fischer, C. Wenzel, N. Schell, W. Matz, H. Engelmann, E. Zschech, Microelectronics Reliability 40, 1765 (2000)
[2] M. Hecker, D. Fischer, V. Hoffmann, H.-J. Engelmann, A. Voss, N. Mattern, C. Wenzel, C. Vogt, E. Zschech, Thin Solid Films, 414, 2, 184 (2002)
[3] R. Huebner, M. Hecker, N. Mattern, V. Hoffmann, K. Wetzig, C. Wenger, H.-J. Engelmann, C. Wenzel, E. Zschech, J.W. Bartha , Thin Solid Films, 437, 248 (2003)
[4] V. Hoffmann, R. Dorka, L. Wilken, V.D. Hodoroaba, K. Wetzig, Surface and Interface Analysis 35, 7, 575 (2003)

  • Lecture (Conference)
    2004 Winter Conference on Plasma Spectrochemistry, 05.-10.01.2004, Fort Lauderdale, U.S.A.

Permalink: https://www.hzdr.de/publications/Publ-9959
Publ.-Id: 9959


A method of proceeding the elements of the system matrix for iterative reconstruction of PET data

Shakirin, G.

A method of proceeding the elements of the system matrix for iterative reconstruction of PET data

  • Lecture (others)
    IBT, 15.12.2005, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9958
Publ.-Id: 9958


Der Rossendorfer Freie-Elektronen Laser

Seidel, W.; Wünsch, R.

Der Rossendorfer Freie-Elektronen Laser

  • Lecture (others)
    IKTP, 27.01.2005, Dresden, Deutschland
  • Lecture (others)
    ILT, 17.11.2005, Aachen, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9957
Publ.-Id: 9957


Ion Beam Synthesis and Patterning by FIB

Bischoff, L.; Schmidt, B.; Akhmadaliev, C.

Die Ionenstrahlsynthese mittels Fokussierten Ionenstrahl (FIB) wird am Beispiel des Kobalt-Disilizides erläutert und demonstriert sowie Anwendungen aufgezeigt.
Weitere FIB Applikationen im Bereich der Nano-Technologie, wie das Vorstrukturieren (Templating), die Ga-Implantation und das selektive anisitrope nasschemiche Ätzen als auch die Metallorganische CVD mit dem FIB werden diskutiert.

Keywords: FIB; Ionenstrahlsysnthese; Nanostrukturen

  • Lecture (Conference)
    RUBion Workshop: Ionenstrahlen und Nanotechnologie, 10.-11.05.2007, Bochum, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9956
Publ.-Id: 9956


Nuclear-structure and nuclear-astrophysics experiments at the superconducting electron accelerator ELBE

Schwengner, R.

  • Invited lecture (Conferences)
    Invited Lecture at the XVI International School on Nuclear Physics, Neutron Physics and Nuclear Energy, 19.-26.09.2005, Varna, Bulgaria

Permalink: https://www.hzdr.de/publications/Publ-9955
Publ.-Id: 9955


The decay of 1+ states as a new probe of the structure of 0+ shape isomers

Schwengner, R.

  • Lecture (Conference)
    DPG Tagung, 04.-09.03.2005, Berlin, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9954
Publ.-Id: 9954


An estimate of the K+ cross section in the reaction C+C at 2AGeV

Sadovski, A.

  • Lecture (Conference)
    HADES PID Meeting, 12.-14.12.2005, Rez, Czech Republic

Permalink: https://www.hzdr.de/publications/Publ-9953
Publ.-Id: 9953


K+ production in Carbon-Carbon collisions at 2GeV per nucleon measured with HADES experiment

Sadovski, A.

  • Lecture (others)
    IKTP, 23.06.2005, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9952
Publ.-Id: 9952


K+ production in the reaction C+C at 2AGeV

Sadovski, A.

  • Lecture (Conference)
    HADES Collab. Meeting XV, 07.-12.06.2005, Dubna, Russia

Permalink: https://www.hzdr.de/publications/Publ-9951
Publ.-Id: 9951


High resolution Runge-Kutta tracking for kaon reconstruction

Sadovski, A.

  • Lecture (Conference)
    DPG Tagung, 04.03.2005, Berlin, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-9950
Publ.-Id: 9950


Mensch und Strahlung

Pawelke, J.

  • Lecture (others)
    Lange Nacht der Wissenschaften, 01.07.2005, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9949
Publ.-Id: 9949


Design and construction of a prototype TRD for the CBM experiment at GSI

Naumann, L.

  • Invited lecture (Conferences)
    GSI Darmstadt, 08.-09.12.2005, Darmstadt, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9948
Publ.-Id: 9948


Testing RPC timing at the Rossendorf electron Linac ELBE

Kotte, R.

  • Lecture (Conference)
    CBM-RPC-Hadron-ID workshop, 14.12.2005, Darmstadt, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-9947
Publ.-Id: 9947


FOPI plastic wall status (S279, S297)

Kotte, R.

  • Lecture (Conference)
    FOPI collaboration meeting, 12.-13.12.2005, Darmstadt, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-9946
Publ.-Id: 9946


RPC timing tests at ELBE

Kotte, R.

  • Lecture (Conference)
    FOPI collaboration meeting, 12.-13.12.2005, Darmstadt, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9945
Publ.-Id: 9945


Seeking sub-100ps timing without fast reference detector at the Rossendorf Electron Linac ELBE

Kotte, R.

  • Lecture (Conference)
    FOPI collaboration meeting, 26.-28.05.2005, Split, Croatia

Permalink: https://www.hzdr.de/publications/Publ-9944
Publ.-Id: 9944


Development of a Neutron Time-of-Flight Source at ELBE Accelerator

Klug, J.

  • Lecture (Conference)
    Int. Conf. on New Trends in Physics Applications and Technology, 09.09.2005, Pavia, Italy

Permalink: https://www.hzdr.de/publications/Publ-9943
Publ.-Id: 9943


Flash lamp processing for Group IV semiconductors

Skorupa, W.

The flash lamp processing for Group IV semiconductors is discussed.

Keywords: flash lamp processing; semiconductors

  • Lecture (others)
    Lecture, Department of Engineering, University of Cambridge, 02.12.2004, Cambridge, UK

Permalink: https://www.hzdr.de/publications/Publ-9942
Publ.-Id: 9942


Blitzlampen-Temperung im msec-Bereich für die SiC-Si-Heteroepitaxie

Skorupa, W.

Das Verfahren zur Blitzlampen-Temperung im msec-Bereich für die SiC-Si-Heteroepitaxie wird vorgestellt.

Keywords: flash lamp annealing; silicon; silicon carbide; heteroepitaxy

  • Lecture (others)
    Vortrag, Institut für Angewandte Physik, Universität Erlangen-Nürnberg, 11.11.2004, Erlangen, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9941
Publ.-Id: 9941


Silizium-basierte Lichtemission und Blitzlampen-Temperung: Innovationen bei FWI

Skorupa, W.

Es wird ein Überblick über Innovationen im Institut FWI bei der Silizium-basierten Lichtemission und der Blitzlampen-Temperung gegeben.

Keywords: light emission; silicon; ion implantation; flash lamp annealing

  • Lecture (others)
    Vortrag, Senioren-Club des FZR,, 04.11.2004, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9940
Publ.-Id: 9940


Silicon-based light emission from ion-implanted materials

Skorupa, W.

An overview about silicon-based light emission from ion-implanted materials is given.

Keywords: light emission; silicon; ion implantation

  • Lecture (others)
    Lecture, Department of Physics, Oslo University, 12.08.2004, Oslo, Norway

Permalink: https://www.hzdr.de/publications/Publ-9939
Publ.-Id: 9939


EPOS – ELBE positron source: positron annihilation multifacility project in Dresden

Krause-Rehberg, R.; Bondarenko, V.; Brauer, G.

The EPOS – ELBE positron source, a positron annihilation multifacility project in Dresden, is presented.

Keywords: positron source

  • Lecture (others)
    MATERIALICA, Neue Messe München, 21.-23.09.2004, München, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9938
Publ.-Id: 9938


Fabrication and evaluation of efficient light emitters comprising nanocluster-rich SiO2 layers

Yankov, R. A.; Gebel, T.; Rebohle, L.; Trautmann, T.; Skorupa, W.; Gauglitz, G.; Frank, R.

Fabrication and evaluation of efficient light emitters comprising nanocluster-rich SiO2 layers

Keywords: efficient light emitters; nanocluster; silicon dioxide

  • Contribution to external collection
    Photonic Crystal Materials and Nanostructures: Fabrication and evaluation of efficient light emitters comprising nanocluster-rich SiO2 layers, SPIE vol. 5450, Bellingham, WA, USA: SPIE, 2004, 578-585

Permalink: https://www.hzdr.de/publications/Publ-9937
Publ.-Id: 9937


Enhancement of the photoluminescence of silicon nanocrystals under the influence of electric field

Vandyshev, E. N.; Zhuravlev, K. S.; Gilinsky, A. M.; Skorupa, W.

The effect of electric field generated by the application of surface acoustic waves on photoluminescence (PL) of silicon nanocrystals embedded in SiO2 films is studied. It is shown that the application of electric field results in an increase in the intensity of nanocrystal PL, the increase amounting to 10% at a field amplitude of 6 kV cm(-1). The results are discussed within the frame of the self-trapped exciton model.

Keywords: photoluminescence; silicon dioxide; ion implantation; nanocrystals

  • Physica E 21(2004)2-4, 304-307

Permalink: https://www.hzdr.de/publications/Publ-9936
Publ.-Id: 9936


Ion Beam Processing for Silicon - Based Light Emission

Skorupa, W.; Dekorsy, T.; Gebel, T.; Helm, M.; Lysenko, V. S.; Nazarov, A. N.; Osiyuk, I. N.; Rebohle, L.; Schmidt, B.; Sun, J. M.

In this talk an overview will be presented regarding the influence of ion irradiation effects and treatments on the formation of silicon-based light emission structures and devices. After a short overview to the complete field-as to my knowledge- we will concentrate on two activities performed at the FZR during the last years, (i) Blue-violet (400 nm) light emitters basing on Metal-Oxide-Silicon capacitors, and, (ii) Infrared (~1µm) light emitters basing on pn-junctions. Both approaches use ion beam processing as a key doping technique of advanced semiconductor technologies. For the first case we employed implantation of group IV ions (C, Si, Ge, Sn) into thermally silicon dioxide layers followed by an appropriate annealing step leading to electroluminescence effects with a power efficiency/external quantum efficiency of ~0.5/10 %. This preparation leads to the formation of semiconductor nanoclusters in the oxide matrix; the luminescence itself is related to defects. Comparing to other oxide production techniques like sputtering or evaporation it is shown that such high electroluminescence values are only possible on the base of ion beam processing, i.e. the combination of nanocluster synthesis and beam-induced energy deposition. For the second case we will demonstrate that appropriate boron implantation and annealing steps can lead to pn-junctions with two electroluminescence bands from bound excitons at 1.065 eV and around 0.95 eV. This effect needs local oversaturation of boron –which, of course, is only possible by ion implantation- leading to nanoclusters which produce the necessary doping and strain induced disturbances to the band structure.

Keywords: ion beam processing; silicon; light emission

  • Contribution to proceedings
    Materials Research Society Fall Meeting, 01.-05.12.2003, Boston, USA
    Materials Research Society Fall Meeting, vol. 792 (2004), R 11.1.1

Permalink: https://www.hzdr.de/publications/Publ-9935
Publ.-Id: 9935


Nanocluster-rich silicon dioxide layers: electroluminescence and charge trapping

Gebel, T.; Rebohle, L.; Yankov, R. A.; Nazarov, A. N.; Skorupa, W.

Keywords: Nanocluster; silicon dioxide layers; electroluminescence; charge trapping

  • Contribution to external collection
    Pistora, Jaromir (u.a.): Microwave and Optical Technology 2003, Proceedings of the SPIE, Volume 5445, Bellingham, WA, USA: SPIE Int. Soc. Opt. Eng., 2004, 284-289

Permalink: https://www.hzdr.de/publications/Publ-9934
Publ.-Id: 9934


Comparative evaluation of coolant mixing experiments at the ROCOM, Vattenfall, and Gidropress test facilities

Kliem, S.; Hemström, B.; Bezrukov, Y.; Höhne, T.; Rohde, U.

Coolant mixing is an important mitigative mechanism against reactivity accidents caused by local boron dilution. Experiments on coolant mixing were carried out at three different test facilities representing three different reactor types. These are the ROCOM test facility modelling a German KONVOI-type reactor, the Vattenfall test facility being a model of a Westinghouse three-loop PWR and the Gidropress test facility modelling a VVER-1000 PWR. The scenario of the start-up of the first main coolant pump was investigated in all three facilities.
The experiments were accompanied by velocity measurements in the downcomer for the same scenario in the ROCOM and the Vattenfall test facilities. A similar flow structure was found in these measurements in both cases. A maximum of the velocity is measured at the opposite side in regard to the position of the loop with the starting-up pump whilst a recirculation area was found just below this inlet nozzle in both facilities.
The analysis of the slug mixing experiments showed also comparable flow behaviour. In accordance with the velocity measurements, the first part of the deboration is also found on the opposite side. In this region, the maximum deboration is measured in all three cases. These maximum values are in the same order of magnitude for nearly identical initial slug volumes.

  • Open Access Logo Science and Technology of Nuclear Installations 2007(2007), 25950
    DOI: doi:10.1155/2007/25950
  • Lecture (Conference)
    Annual Meeting of the AER Working Group D, 08.-09.05.2007, Paris, France

Permalink: https://www.hzdr.de/publications/Publ-9933
Publ.-Id: 9933


Deep level defects in He-implanted n-6H-SiC studied by deep level transient spectroscopy

Chen, X. D.; Ling, C. C.; Fung, S.; Beling, C. D.; Wu, H. S.; Brauer, G.; Anwand, W.; Skorupa, W.

Deep level defects in He-implanted n-6H-SiC studied by deep level transient spectroscopy

Keywords: He-implantion; n-6H-SiC; deep level transient spectroscopy

  • Contribution to proceedings
    Materials Research Society Spring Meeting 2004, 12.-16.04.2004, San Francisco, USA
    Silicon carbide – materials, processing, and devices 815 (2004), J5.5, New York: Taylor & Francis

Permalink: https://www.hzdr.de/publications/Publ-9932
Publ.-Id: 9932


Slow positron implantation spectroscopy – a tool to characterize vacancy-type damage in ion-implanted 6H-SiC

Brauer, G.; Anwand, W.; Coleman, P. G.; Skorupa, W.

A lecture is given about slow positron implantation spectroscopy as a tool to characterize vacancy-type damage in ion-implanted 6H-SiC

Keywords: positron beam; SiC; defects

  • Lecture (others)
    Lecture, Department of Physics, University of Texas at Austin, 19.10.2004, Austin/TX, USA
  • Lecture (others)
    Lecture, Physics Department, University of Texas at Arlington, 21.10.2004, Arlington/TX, USA
  • Lecture (others)
    Lecture, Department of Physics, Texas Christian University, 22.10.2004, Ft. Worth/TX, USA

Permalink: https://www.hzdr.de/publications/Publ-9931
Publ.-Id: 9931


Epitaxial 3C-SiC formation at the SiO2/Si interface by C+ Implantation into SiO2 and subsequent annealing

Voelskow, M.; Panknin, D.; Polychroniadis, E. K.; Ferro, G.; Monteil, Y.; Godignion, P.; Mestres, N.; Skorupa, W.; Stoemenos, J.

The epitaxial 3C-SiC formation at the SiO2/Si interface by C+ Implantation into SiO2 and subsequent annealing is studied.

Keywords: SiC formation; carbon implantation; SiO2

  • Lecture (Conference)
    5th European Conference Silicon Carbide and Related Materials, 31.08.-04.09.2004, Bologna, Italy

Permalink: https://www.hzdr.de/publications/Publ-9930
Publ.-Id: 9930


Efficient silicon light emitting diodes by boron implantation: the mechanism

Sun, J. M.; Dekorsy, T.; Skorupa, W.; Schmidt, B.; Mücklich, A.; Helm, M.

The mechanism of efficient light emission in boron implanted silicon diodes is discussed.

Keywords: silicon; light emission; boron implantation

  • Lecture (Conference)
    European Materials Research Society Spring Meeting, 24.-28.05.2004, Strasbourg, France

Permalink: https://www.hzdr.de/publications/Publ-9929
Publ.-Id: 9929


Temperature dependence of efficient silicon light-emitting diodes prepared by ion implantation

Sun, J. M.; Dekorsy, T.; Skorupa, W.; Schmidt, B.; Helm, M.

The temperature dependence of efficient silicon light-emitting diodes prepared by ion implantation is investigated.

Keywords: silicon; light emitting diodes; ion implantation

  • Lecture (Conference)
    DPG Tagung, 08.-12.03.2004, Regensburg, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9928
Publ.-Id: 9928


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