Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

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41688 Publications

Nuclear and Hadron Physics and Project ELBE; Annual Report 1996

Barz, H.-W.; Dönau, F.; Enghardt, W.; Grosse, E.; Kämpfer, B.; Prade, H.; Schlett, M.; Wünsch, R.

  • Open Access Logo Forschungszentrum Rossendorf; FZR-179 April 1997
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-947

The Chiral Quark-Loop Soliton in a Hot Gas of Constituent Quarks

Schleif, M.; Wünsch, R.

Abstract

Abstract
We consider a chiral one-loop hedgehog soliton of the bosonized SU(2)f Nambu & Jona-Lasinio model which is embedded in a liot medium of constituent quarks. Energy and radius of the soliton are determined in self-consistent mean-field approximation. Quasi-classical corrections to the soliton energy are derived by means of the pushing and cranking approaches. The corresponding inertial parameters are evaluated. It is shown that the inertial mass is equivalent to the total internal energy of the soliton. Corrected nucleon and ∆ isobar masses are calculated in dependence on temperature and density of the medium. As a result of the internal structure of the soliton which is controlled by the self-consistent mean field, the scaling between constituent quark mass and soliton mass is noticeable disturbed.

  • Open Access Logo Forschungszentrum Rossendorf; FZR-182
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-946

Ionendriftprozesse in Borsilikatgläsern während des anodischen Bondens

Nitzsche, P.; Lange, K.; Schmidt, B.; Grigull, S.; Kreißig, U.; Huber, H.; Assmann, W.; Thomas, B.; Herzog, K.

  • Open Access Logo Forschungszentrum Rossendorf; FZR-184 Juli 1997
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-944

N.C.A.11C-Labelling of Benzenoid Compounds in Ring Positions: [11C]Anisole Derivatives

Mäding, P.; Steinbach, J.; Johannsen, B.

Abstract

The synthesis route to n.c.a. 3-nitro-[3-C-11]anisole (3) by use of the principle of synchronous six-electron cyclization of hexatriene systems into aromatics is described and discussed. Nitro-[C-11]-methane (1) reacts with the prepared precursor 5-dimethylamino-2-methoxy-penta-2,4-dienylidene-1-dimethylammonium tetrafluoroborate (2b) in the presence of BuLi to form 1-dimethylamino-4-methoxy-6-nitro-[6-C-11]hexatriene (IA, IB), followed by cyclization/ aromatization into 3. Starting from 1, 3-nitro-[3-C-11]anisole of a radiochemical purity of about 65 % and a mean specific radioactivity of 1 Ci/mu mol was obtained within 10 min. Related to [C-11]CH3NO2, the reproducible radiochemical yield of 3 (decay-corrected) was 60+/-5 %. Reduction of 3 by heating the above reaction mixture with aqueous Na2S gave 3-amino-[3-C-11]anisole (4) of a radiochemical purity of about 50 %. The reproducible radiochemical yield of 4 (decay-corrected) in relation to 1 was 45+/-5 %, the synthesis time from 1 was 16 min.

  • Journal of Labelled Compounds and Radiopharmaceuticals 39 (7): 585-599 JUL 1997

Permalink: https://www.hzdr.de/publications/Publ-942

Sheath and Presheath Dynamics in Plasma Immersion Ion Implantation

Mändl, S.; Günzel, R.; Möller, W.

  • Journal of Physics D: Applied Physics 31 (1998) 1109-1117

Permalink: https://www.hzdr.de/publications/Publ-940

Helium Bubbles in Silicon: Study of the Residual Helium Content using Elastic Recoil Detection Analysis

Kaschny, J. R.; Fichtner, P. F. P.; Mücklich, A.; Kreißig, U.; Yankov, R. A.; Skorupa, W.

  • Lecture (Conference)
    13th Int. Conf. on Ion Beam Analysis (IBA-13), Lissabon, Portugal, July 27 - Aug 1, 1997
  • Contribution to external collection
    Nucl. Instr. Meth. B136-138 (1998) 583

Permalink: https://www.hzdr.de/publications/Publ-939

Identification and Discrimination of Thiobacilli Using ARDREA, RAPD and Rep-APD

Selenska-Pobell, S.; Otto, A.; Kutschke, S.

Permalink: https://www.hzdr.de/publications/Publ-938

In Situ ERDA Studies of Ion Drift Processes

Kreißig, U.; Grigull, S.; Lange, K.; Nitzsche, P.; Schmidt, B.

  • Nuclear Instruments and Methods in Physics Research B ( IBA '97)

Permalink: https://www.hzdr.de/publications/Publ-937

Angle dependent Mössbauer Spectroscopy

Reuther, H.; Behr, G.

  • Contribution to external collection
    Hyperfine Interactions ( ICAME '97 Conf. Proc.)

Permalink: https://www.hzdr.de/publications/Publ-936

Alloying by High Dose Ion Implantation of Iron into Magnesium and Aluminium

Reuther, H.; Betzl, M.; Matz, W.; Richter, E.

Permalink: https://www.hzdr.de/publications/Publ-935

Phase Formation of Iron Silicides by Ion Implantation

Dobler, M.; Reuther, H.; Möller, W.

  • Hyperfine Interactions (C) 3 (1998) 145-148

Permalink: https://www.hzdr.de/publications/Publ-934

A Combination of Atomic and Continuum Models Describing the Evolution of Nanoclusters

Strobel, M.; Heinig, K.-H.; Möller, W.

Permalink: https://www.hzdr.de/publications/Publ-933

Molecular-Dynamics Studies of a C:H Film Growth by Energetic Hydrocarbon Molecule Impact

Jäger, H.-U.; Weiler, W.

Permalink: https://www.hzdr.de/publications/Publ-931

Novel Rhenium Complexes Derived from ALPHA-Tropanol as Potential Ligands for the Dopamin Transporter

Hoepping, A.; Brust, P.; Berger, R.; Leibnitz, P.; Spies, H.; Machill, S.; Scheller, D.; Johannsen, B.

Permalink: https://www.hzdr.de/publications/Publ-930

Thermodynamic properties of the SU(2)f chiral quark-loop soliton

Schleif, M.; Wünsch, R.

Permalink: https://www.hzdr.de/publications/Publ-929

Comment on Amorphization and Defect Recombination in Ion Implanted Silicon Carbide

Heera, V.

Permalink: https://www.hzdr.de/publications/Publ-928

Microstructure and Tribological Properties of Aluminium Implanted with High Doses of Nickel

Wieser, E.; Grötzschel, R.; Mücklich, A.; Prokert, F.

Permalink: https://www.hzdr.de/publications/Publ-927

A Simple Paper-based Secondary Standard for Energy Dispersive X-Ray Analysis

Neelmeijer, C.; Hüller, J.; Mäder, M.; Borchers, B.; Jarjis, R.

Permalink: https://www.hzdr.de/publications/Publ-926

Nitriding of Austenitic Stainless Steel Using Plasma Immersion Ion Implantation

Mändl, S.; Günzel, R.; Richter, E.; Möller, W.

Permalink: https://www.hzdr.de/publications/Publ-924

Wave mixing at the Hg-HgO interface

Kolevzon, V.; Pozdniakov, G.

  • Other report
    1997 Fall MRS Meeting, Boston December 2-6

Permalink: https://www.hzdr.de/publications/Publ-923

Roughness Improvement and Hardness Enhancement in Nanoscale Al/AlN Multilayered Thin Films

Wang, X.; Kolitsch, A.; Möller, W.

Permalink: https://www.hzdr.de/publications/Publ-922

Synthesis of Rhenium(I) and Technetium(I) Carbonyl/Dithioether Ligand Complexes Bearing 3,17-BETA-Estradiol

Reisgys, M.; Wüst, F.; Alberto, R.; Schibli, R.; Schubiger, P. A.; Pietzsch, H.-J.; Spies, H.; Johannsen, B.

Permalink: https://www.hzdr.de/publications/Publ-921

HPLC-Analysis of the Metabolism of 6-[18F]-Fluoro-L-DOPA (FDOPA) in the Brain of Neonatal Pigs

Vorwieger, G.; Brust, P.; Bergmann, R.; Bauer, R.; Walter, B.; Füchtner, F.; Steinbach, J.; Johannsen, B.

  • Book (Authorship)
    Quantitative Functional Brain Imaging with Positron Emission Tomography, Carson, R. E.; Daube-Witherspoon, M. E.; Herscovich, P.; eds); Academic Press, 285-292
    DOI: 10.1016/B978-012161340-2/50045-7

Permalink: https://www.hzdr.de/publications/Publ-920

Recriticality Calculations for Uraniumdioxide-Water Systems with MCNP

Kumpf, H.

Abstract

With the aim of generating a certain feeling for the general dependencies of the multiplication factor k∞ the first section provides some results for two classes of deformations of the original fuel pins. The main part examines UO2-structures of increasing disorder, beginning with the hexagonal close package of fuel spheres and ending up with stochastic geometries. Among these structures the worst case, i.e. the one with the highest k∞ but preserving mechanical stability is identified. The composition and geometric parameter of this case is used to calculate the critical thickness of a slab and critical radius of a sphere.

  • Open Access Logo Forschungszentrum Rossendorf; FZR-183, June 1997
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-919

On-Line Isothermal Gas Chromatography with Short-lived Mo- and Tc-Isotopes in the O2H2O(g)/SiO2(s)-System

Vahle, A.

  • Lecture (Conference)
    4. Workshop Chemistry and Physics of the Heaviest Elements, 5.-8.6.1997, Göteborg

Permalink: https://www.hzdr.de/publications/Publ-918

Trace Amount Components in Laminar Gas Flow - Theoretical and Experimental Studies

Grantz, M.

  • Lecture (Conference)
    4. Workshop Chemistry and Physics of the Heaviest Elements, 5.-8.6.1997, Göteborg

Permalink: https://www.hzdr.de/publications/Publ-917

Multimodal impurity redistribution and nanocluster formation in Ge implanted silicon dioxide films

von Borany, J.; Grötzschel, R.; Heinig, K.-H.; Markwitz, A.; Matz, W.; Schmidt, B.; Skorupa, W.

Permalink: https://www.hzdr.de/publications/Publ-916

Thermochromatography of No-259

Taut, S.

  • Lecture (Conference)
    4. Workshop Chemistry and Physics of the Heaviest Elements, 5.-8.6.1997, Göteborg

Permalink: https://www.hzdr.de/publications/Publ-915

Status of the Preparation for Seaborgium Gas Chemistry Experiments with Oxidehydroxides

Hübener, S.

  • Lecture (Conference)
    4. Workshop Chemistry and Physics of the Heaviest Elements, 5.-8-6-1997, Göteborg

Permalink: https://www.hzdr.de/publications/Publ-914

Deposition of tetrahedral hydrogenated amorphous carbon using a novel Elecron Cyclotron Wave Resonance reactor

Weiler, M.; Lang, K.; Li, E.; Robertson, J.

Permalink: https://www.hzdr.de/publications/Publ-911

Direktmessung alpha-aktiver Nuklide - Projektfortschritte

Nebelung, C.; Nitsche, H.; Bernhard, G.

  • Lecture (Conference)
    GRS Köln, 12.5.97

Permalink: https://www.hzdr.de/publications/Publ-910

The 4 pi - fragment - spectrometer FOBOS

Ortlepp, H.-G.; Wagner, W.; Herbach, C.-M.; Aleksandrov, A. A.; Aleksandrova, I. A.; Andrassy, M.; Budzanovski, A.; Czech, B.; Danziger, M.; Dietterle, L.; Doronin, V. N.; Dshemuchadse, S.; Fomichev, A. S.; Fromm, W. D.; Gebhardt, M.; Gippner, P.; Heidel, K.; Heinitz, S.; Homeyer, H.; Ivanovsky, S. I.; Kamanin, D. V.; Kolesov, I. V.; Matthies, A.; May, D.; Merzlyakov, S. I.; von Oertzen, W.; Oganessian, Y. T.; Pausch, G.; Penionzhkevich, Y. E.; Pyatkov, Y. V.; Radnev, S. V.; Renz, G.; Rubinskaya, L. A.; Sandrev, I. D.; Schilling, K.-D.; Seidel, W.; Shishkin, D. I.; Sirotin, A. P.; Sodan, H.; Strekalovsky, O. V.; Tishchenko, V. G.; Trofimov, V. V.; Tsurin, I. P.; Umlauf, C.; Vakatov, D. V.; Vasko, V. M.; Vitenko, V. A.; Will, E.; Wilpert, M.; Yanez, R.; Zhuchko, V. E.; Ziem, P.; Zrodlowski, L.

Abstract

Abstract
The 4 π - fragment - spectrometer FOBOS developed for heavy-ion research at beam energies of 10 - 100 AMeV has been commissioned for physical experiments at the Flerov Laboratory of Nuclear Reactions of the Joint Institute for Nuclear Research in Dubna. Based on the logarithmic detector principle, it is able to register charged fragments from Protons up to heavy residual nuclei in a large dynamical range. Position-sensitive avalanche counters, axial ionization chambers and CsI(TI) scintillation detectors are arranged in three concentric detector shells. An array of phoswich detectors is used as a more granular forward detector at narrow polar angles. The modular concept of FOBOS allows for different experimental application in the field of exclusive fragment spectroscopy at medium multiplicities. For illustration the fragment spectroscopy studies concerning the spontaneous fission process and the fragmentation of hot nuclei by means of the FOBOS set-up are considered.

  • Nuclear Instruments and Methods in Physics Research A 403 (1998) 65-97
  • Open Access Logo Forschungszentrum Rossendorf; FZR-181
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-909

Modification of Silicon Nitride Ceramics with High Intensity Pulsed Ion Beams

Brenscheidt, F.; Piekoszewski, J.; Wieser, E.; Langner, J.; Grötzschel, R.; Reuther, H.

Permalink: https://www.hzdr.de/publications/Publ-907

Institut of Radiochemistry; Annual Report 1996

Nitsche, H.; Bernhard, G.; Engelmann, H.-J.

  • Open Access Logo Forschungszentrum Rossendorf; FZR-180
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-906

Ion drift processes in PYREX-type alkali-borosilicate glass during anodic bonding

Nitzsche, P.; Lange, K.; Schmidt, B.; Grigull, S.; Kreißig, U.; Thomas, B.; Herzog, K.

Permalink: https://www.hzdr.de/publications/Publ-905

Windenergiepotential in Sachsen

Hirsch, W.; Rindelhardt, U.

Abstract

The wind energy ressources of Saxony, a typical interior state of Germany, have been estimated based on a special wind measuring programme. It was performed between 1991 and 1995. The main problem in applying the wind atlas method was to determine the areas with the same wind climate and the corresponding data sets (atlas stations). After defining the atlas stations ressource file calculations were performed over about 60 % of the saxon territory. The technical potential of wind energy in Saxony was estimated to be 5 TWh p.a. First results from saxon WEC`s confirm the results.

  • DEWI-Magazin Nr. 11, August 1997, S. 44 - 49

Permalink: https://www.hzdr.de/publications/Publ-904

Ermittlung bruchmechanischer Kennwerte im instrumentierten Kerbschlagbiegeversuch - Vergleichsuntersuchungen zur Rißdetektion mit Schallemission und dem Laserstreulichtverfahren

Richter, H.; Böhmert, J.; Valo, M.; Viehrig, H.-W.

  • Lecture (Conference)
    Deutscher Verband für Materialforschung und -prüfung, Tagung Werkstoffprüfung 1997, Dezember 1997, Bad Nauheim, Vortragsband, S. 217 ff.
  • Contribution to proceedings
    Deutscher Verband für Materialforschung und -prüfung, Tagung Werkstoffprüfung 1997, Dezember 1997, Bad Nauheim, Vortragsband, S. 217 ff.

Permalink: https://www.hzdr.de/publications/Publ-903

Electron spectroscopy for chemical analysis Investigation of the Interaction of uranyl and calcium ions with humic acids

Nefedov, V. I.; Teterin, Y. A.; Lebedev, A. M.; Teterin, A. Y.; Dementjev, A. P.; Bubner, M.; Reich, T.; Pompe, S.; Heise, K.-H.; Nitsche, H.

Permalink: https://www.hzdr.de/publications/Publ-902

Entwicklungen in der Technetiumchemie für die Nuklearmedizin

Johannsen, B.

  • Nuclear Medizin 33 (1994) A 90 (Abstract)

Permalink: https://www.hzdr.de/publications/Publ-901

Theoretische Untersuchungen zur Fluid-Struktur-Wechselwirkung in zweiphasig durchströmten Schwingungsmodellen

Grunwald, G.

Abstract

Kurzfassung
Ausgehend von den Grundgleichungen für Kontinuität, Impuls und Energie einer Zweiphasenströmung werden Beziehungen für ein Ersatzfluid des Gas- Flüssigkeits- Gemisches mit orts- und zeitabhängiger Dichte und Geschwindigkeit aufgestellt und anhand eines Siedemodells geprüft. Es folgen Anwendungen auf ein 1D- und ein 2D- Schwingungsmodell (Pendel im Zweiphasenstrom) unter Berücksichtigung der Fluid-Struktur- Wechselwirkung und die Berechnung von Eigenfrequenzen und Dämpfungen.

  • Open Access Logo Forschungszentrum Rossendorf; FZR-178 April 1997
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-900

X-ray spectroscopy on ECR plasmas

Friedlein, R.; Herpich, S.; Lehnert, U.; Tyrroff, H.; Wirth, H.; Zippe, C.; Zschornack, G.

Permalink: https://www.hzdr.de/publications/Publ-899

Energy dispersive X-ray spectroscopy for ECR plasma diagnostics

Friedlein, R.; Küchler, D.; Zippe, C.; Zschornack, G.; Tyrroff, H.

Permalink: https://www.hzdr.de/publications/Publ-898

Experimental study of the hot and warm electron populations in an electron cyclotron resonance argon-oxygen-hydrogen plasma

Friedlein, R.; Herpich, S.; Hiller, H.; Wirth, H.; Zschornack, G.; Tyrroff, H.

Permalink: https://www.hzdr.de/publications/Publ-897

Hot and warm electron energy distribution at different electron cyclotron resonance ion source operation regimes

Friedlein, R.; Tyrroff, H.; Henke, D.; Zippe, C.; Zschornack, G.

Permalink: https://www.hzdr.de/publications/Publ-896

Characteristic x rays and electron energy distribution function in anisotropical hot plasmas

Friedlein, R.; Tyrroff, H.; Zippe, C.; Zschornack, G.; Barnitzke, W.

Permalink: https://www.hzdr.de/publications/Publ-895

Electrical and optical characterisation of double SIMOX structures formed by sequential high energy oxygen implantation into silicon

Hatzopoulos, N.; Panknin, D.; Fukarek, W.; Skorupa, W.; Siapkas, D. I.; Hemment, P. L. F.

Permalink: https://www.hzdr.de/publications/Publ-894

Ion optical system for transport and deceleration of highly charged ions

Henke, D.; Tyrroff, H.

Permalink: https://www.hzdr.de/publications/Publ-893

Ion-beam modification of ISFET membranes for copper ion detection

Hüller, J.; Pham, T.; Vopel, T.; Albrecht, J.

Permalink: https://www.hzdr.de/publications/Publ-892

Role of hydrogen ions in plasma-enhanced chemical vapor deposition of hydrocarbon films, investigated by in situ ellipsometry

von Keudell, A.; Jacob, W.; Fukarek, W.

Permalink: https://www.hzdr.de/publications/Publ-891

Investigation of the damage induced by 200 keV Ge+ ion implantation in 6H-SiC

Pacaud, Y.; Skorupa, W.; Perez-Rodriguez, A.; Brauer, G.; Stoemenos, J.; Barklie, R.

Permalink: https://www.hzdr.de/publications/Publ-890

Ion beam sensitized SiO2 surface for halide ions

Pham, T.; Matz, W.; Möller, W.; Hüller, J.

Permalink: https://www.hzdr.de/publications/Publ-889

Coimplantation of silver and halogens in thin SiO2 films

Pham, T.; Möller, W.; Hüller, J.; Albrecht, J.

Permalink: https://www.hzdr.de/publications/Publ-888

Room-temperature, sorth-wavelength (400-500 nm) photoluminescence from silicon-implanted silicon dioxide films

Skorupa, W.; Yankov, R. A.; Tyschenko, I. E.; Fröb, H.; Böhme, T.; Leo, K.

Permalink: https://www.hzdr.de/publications/Publ-887

CEMS study on magnetic structure of Fe-Si-Al films implanted with Al and N ions

Nomura, K.; Reuther, H.; Richter, E.; Ujihira, Y.

  • Contribution to proceedings
    ICAME '95, Conference Proceedings Vol. 50, Ed.: I. Ortalli, SIF Bologna, 1996, pp. 703-706

Permalink: https://www.hzdr.de/publications/Publ-886

Investigations of texture formation in geomaterials by neutron diffraction with high pressure chambers

Nikitin, A. N.; Sukhoparov, W. A.; Heinitz, J.; Walther, K.

Permalink: https://www.hzdr.de/publications/Publ-885

Ion beam induced crystallization of 6H-SiC

Heera, V.; Kögler, R.; Skorupa, W.; Stoemenos, J.

  • Book (Authorship)
    Institute of Physics Conference Series No 142: Chapter 3, pp. 533-536, Silicon Carbide and Related Materials 1995 Conf., Kyoto, Japan, c 1996 IOP Pub.

Permalink: https://www.hzdr.de/publications/Publ-884

High dose co-implantation of aluminium and nitrogen in 6H-silicon carbide

Heera, V.; Pezoldt, J.; Ning, X. J.; Pirouz, P.

  • Book (Authorship)
    Institute of Physics Conference Series No 142: Chapter 3, pp. 509-512, Silicon Carbide and Related Materials 1995 Conf., Kyoto, Japan, c 1996 IOP Pub.

Permalink: https://www.hzdr.de/publications/Publ-882

Smooth termination of intruder bands in 10951Sb

Schnare, H.; La Fosse, D. R.; Hauschild, K.; Janzen, V. P.; Mullins, S. M.; Beausang, C. W.; de Graaf, J.; Lee, I. Y.; Afanasjev, A. V.

Permalink: https://www.hzdr.de/publications/Publ-881

Nutzung genetischer Algorithmen zur Identifikation von Gesteinsschichten

Hoppe, D.; Schneider, S.

  • Lecture (Conference)
    Berg- und Hüttenmännischer Tag, Freiberg, 1997, Tagungsbericht, S. 146-159
  • Contribution to proceedings
    Berg- und Hüttenmännischer Tag, Freiberg, 1997, Tagungsbericht, S. 146-159

Permalink: https://www.hzdr.de/publications/Publ-880

Evidence for Layered Structure of Boron Nitride Films Detected by Rutherford Backscattering

Plass, M.; Fukarek, W.; Kolitsch, A.; Mäder, M.; Möller, W.

  • Physica Status Solidi A 155 (1996) pp. K1-K4

Permalink: https://www.hzdr.de/publications/Publ-879

Ion implantation and annealing effects in silicon carbide

Heera, V.; Skorupa, W.

Abstract

SiC is a promising semiconductor material for high-power/high-frequency
and high-temperature electronic applications. For selective doping of SiC
ion implantation is the only possible process. However, relatively little
is known about ion implantation and annealing effects in SiC. Compared
to ion implantation into Si there is a number of specific features which
have to be considered for successful ion beam processing of SiC. A brief
review is given on some aspects of ion implantation in and annealing of
SiC. The ion implantation effects in SiC are discussed in direct comparison
to Si. The following issues are addressed: ion ranges, radiation damage,
amorphization, high temperature implantation, ion beam induced crystallization
and surface erosion.

Permalink: https://www.hzdr.de/publications/Publ-877

Quantum-sized silicon precipitates in silicon-implanted and pulse-annealed silicon dioxide films: Photoluminescence and structural transformations

Tyschenko, I. E.; Kachurin, G. A.; Zhuravlev, K. S.; Pazdnikov, N. A.; Volodin, V. A.; Gutakovsky, A. K.; Leier, A. F.; Fröb, H.; Leo, K.; Böhme, T.; Rebohle, L.; Yankov, R. A.; Skorupa, W.

Abstract

Strong blue, red an near-infrared photoluminescence has
been observed from Si+-implanted and pulse annealed SiO2 layers. Raman
scattering and high-resolution electron microscopy analyses have revealed
a correlation between the structure of the Si inclusions in the SiO2 layers
during pulse and furnace annealing have been discussed in terms of the
changes in the light emission ovserved experimentally. Small Si clusters,
non-crystallineinclusions and nanocrystals are believed to be the light
sources. The blue, red and near-infrared photoluminescence is associated
with small complexes of excess Si atoms, non-crystalline Si nanoinclusters
and quantum-confined Si nanocrystals, respectively.

Permalink: https://www.hzdr.de/publications/Publ-876

Implantation and growth of large Beta-FeSi2 precipitates and Alpha-FeSi2 network structures in silicon

Reuther, H.; Dobler, M.

Permalink: https://www.hzdr.de/publications/Publ-874

Verfahren der Ionenstrahlbearbeitung und ihre Anwendung bei Umformwerkzeugen

Richter, E.

Abstract

Ionenstrahltechniken können mit Erfolg zur Verbesserung der Standmengen bei Umformwerkzeugen eingesetzt werden. Am Beispiel der Stickstoffionenimplantation konnte gezeigt werden, dass fü die Umformung weicher Materialien bei Press-, Stanz- und Ziehwerkzeugen eine Verläerung der Einsatzdauer bei Produktionswerkzeugen unter industriellen Bedingungen bis zum Faktor 4 erreichbar ist. Vorteilhaft ist eine gezielte Bearbeitung der verschleissgefährdeten Regionen eines Werkzeuges mit Hilfe eines gerichteten Ionenstrahls. Neben der unmittelbaren Implantation bietet die ionenstrahlgestüzte Beschichtung als Kombination von konventioneller PVD-Beschichtung und Ionenimplantation eine Vielzahl technisch interessanter Mölichkeiten auch fü Umformwerkzeuge.

  • Blech Rohre Profile 43 (1996) 4 pp. 191-194

Permalink: https://www.hzdr.de/publications/Publ-873

Formation of buried layers of (SiC)1-x(AlN)x in 6H-SiC using ion-beam synthesis

Yankov, R. A.; Hatzopoulos, N.; Fukarek, W.; Voelskow, M.; Heera, V.; Pezoldt, J.; Skorupa, W.

Abstract

Solid solutions of SiC and III-V compound semiconductors
are recognized as promising materials for novel semiconductor applications.
This paper reports on experiments which explore the possibility of synthesizing
thin buried layers of (SiC)1-x(AlN)x having composition of about x = 0.2
by co-implanting N+ and Al+ ions into 6H-SiC-wafers maintained at temperatures
in the range 200 - 800 C. Structural and compositional evaluation of as-implanted
samples was carried out using a combination of Rutherford backscattering/channelling
spectrometry and infrared reflectance spectroscopy. It is shown that the
structures are highly sensitive to the substrate temperature. The use of
sufficiently high temperatures (400 - 800 C) enables the crystallinity
of the host material as well as relatively low damage levels to be maintained
during implantation. The formation of Al-N bonds within the implanted layers
is also confirmed over the temperature range studied.

  • Contribution to proceedings
    Materials Research Society symposium proceeding 438 (1997) pp. 271-276, MRS
    DOI: 10.1557/PROC-438-271

Permalink: https://www.hzdr.de/publications/Publ-872

Institute of Ion Beam Physics and Materials Research; Annual Report 1996

von Borany, J.; Jäger, H.-U.; Möller, W.; Wieser, E.

  • Open Access Logo Forschungszentrum Rossendorf; FZR-166
    ISSN: 1436-3976

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Lifetimes of a shears band in139Sm

Brandolini, F.; Ionescu-Bujor, M.; Medina, N. H.; Ribas, R. V.; Bazzacco, D.; de Poli, M.; Pavan, P.; Alvarez, C. R.; de Angelis, G.; Lunardi, S.; von Acuna, D.; Napoli, D. R.; Frauendorf, S.

Permalink: https://www.hzdr.de/publications/Publ-870

Total and nuclear fission cross sections of 238U at relativistic energies

Rubehn, T.; Bassini, R.; Begemann-Blaich, M.; Blaich, T.; Immé, G.; Möhlenkamp, T.; Moretto, L. G.; Schüttauf, A.; Seidel, W.; Trzcinski, A.

Permalink: https://www.hzdr.de/publications/Publ-869

Application of 13C-labelled polychlorinated biphenyl congener 153 as internal standard in the gas chromatogrophic-mass spectrometric analysis of polychlorinated biphenyls

Kubátová, A.; Matucha, M.; Bubner, M.

Permalink: https://www.hzdr.de/publications/Publ-868

Shape of a Co-Nd Liquid Alloy Ion Source

Hesse, E.; Driesel, W.; Dietzsch, C.; Bischoff, L.; Teichert, J.

Abstract

Co-Nd-liquid alloy ion sources (LAIS) were operated of a special specimen holder in situ in a 1 MeV transmission electron microscope. The dynamics of the tip shape in dependence of the ion emission current, spatial shifts of the liquid cone and the process of double cone formation have been observed. This results in a bette understanding of the ion emission processes from Co-Nd-LAISs in a large range of ion current. A linear dependence of the decrease of the cone half angle and of the jet lenght l and of the diameter d on the increased ion emission current was found. No emission of microdroplets at the shanks of the Taylor cone and behind the cone has been detected.

Permalink: https://www.hzdr.de/publications/Publ-867

The Rossendorf 3 MV tandetron: a new generation of high-energy implanters

Friedrich, M.; Bürger, W.; Henke, D.; Turuc, S.

Permalink: https://www.hzdr.de/publications/Publ-866

Synthesis and Structural Characterization of Neutral Oxorhenium(V) Complexes with Tridentate Dithioethers

Pietzsch, H.-J.; Reisgys, M.; Spies, H.; Leibnitz, P.; Johannsen, B.

  • Chemische Berichte 130 (1997) pp. 357-361

Permalink: https://www.hzdr.de/publications/Publ-865

Production and decay of hot nuclei following antiproton annihilation at rest and in flight

Jahnke, U.; Bohne, W.; Eades, J.; von Egidy, T.; Figuera, P.; Fuchs, H.; Galin, J.; Goldenbaum, F.; Gulda, K.; Golubeva, Y. S.; Hartmann, F. J.; Hilscher, D.; Iljinov, A. S.; Jastrzebski, J.; Kurcewicz, W.; Lott, B.; Morjean, M.; Pausch, G.; Péghaire, A.; Pienkowski, L.; Polster, D.; Proschitzki, S.; Quednau, B.; Rossner, H.; Schmid, S.; Schmid, W.

  • Jadernaja fizika 59 (1996) 9 pp, 1625-1634

Permalink: https://www.hzdr.de/publications/Publ-864

Fabrication of MSM detector structures on silicon by focused ion beam implantation

Teichert, J.; Bischoff, L.; Hausmann, S.

Abstract

We report the fabrication of metal-semiconductor-metal
(MSM) photo detectors on silicon substrates with CoSi2 electrodes. The
electrode patterns have been formed by ion beam synthesis applying maskless
implantation with a cobalt focused ion beam. Implantation has been carried
out with the substrate at room temperature and at 400 °C.

Permalink: https://www.hzdr.de/publications/Publ-863

Test of scintillating-fiber calorimeter for photons with energies below 1 GeV

Hübner, B.; Brinkmann, K.-T.; Freiesleben, H.; Lange, J. S.; Naumann, B.; Naumann, L.; Schülke, A.

Permalink: https://www.hzdr.de/publications/Publ-862

Evolution of nanocluster ensembler: Computer simulation of diffusion and reaction controlled Ostwald ripening

Strobel, M.; Reiß, S.; Heinig, K.-H.

Abstract

The Ion Beam Synthesis (IBS) of nanoclusters can be controlled by the flux and the fluence of ions as well as by the implantation and/or annealing temperature. The evolution of the precipitates, mainly described by their particle radius distribution (PRD), the number of remaining particles and the critical radius, depends on these parameters. However, the evolution is expected to behave different for systems like SiO2 and CoSi2 clusters in Si, because they are characterized by quite different ratios of diffusion to reaction constants. Here we present an unified model of Ostwald ripening of nanoclusters, which describes the pure diffusion and reaction controlled limits as well as all intermediate, mixed processes. Expressing the exact solution of the adiabatic diffusion equation by multipole moments we derive the governing equation for the evolution of an ensemble of nanoclusters in the leading monopole approximation. Whereas in the diffusion controlled regime we have the well known infinite range 1/r interaction among the nanoclusters, 1/r2 interactions come into play in the reaction limited regime. Computer simulations for ensembles of several thousands of nanoclusters demonstrate the evolution for typical cases.

  • Nuclear Instruments and Methods in Physics Research B 120 (1996) pp. 216-220

Permalink: https://www.hzdr.de/publications/Publ-861

Mathematisch-numerische Modellierung der Ultraschallstreuung an oberflächenverbundenen Rissen mit dem EFIT-Code

Bergmann, U.; Bergner, F.

Abstract

Abstract
An ultrasonic time-of-flight diffraction method for measuring stable crack growth in a three point bending specimen was analyzed by simulations of the wave field evolution in the test specimen. To calculate the actual crack length from the experimental measured time of flight of a crack tip diffracted ultrasound pulse the echo trains were successively measured during the whole bending test. The simulations deal with the generation and evolution of the ultrasound field in the specimen and with the design of the received signal. The simulations took into account the actual test geometry, the crack growth process, the blunted crack tip and the process of bending. With these simulations all individual received echoes are reproduced and interpreted. The echo, qualified for measuring the time of flight is undoubtedly the transverse wave diffracted on the crack tip. In order to optimize the test method and to increase the accuracy of measurements during the simulations Parameters like probe position, wave mode, measuring frequency and length of aperture of the probes wem separately varied. From the comparison between the simulations and the experimental measurements it can be concluded, that the developed method is weil suited for measuring stable crack growth in small specimens made from ductile material.

  • Open Access Logo Forschungszentrum Rossendorf; FZR-177 1997
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-859

Nachweis verformungsbedingter Strukturschädigung in Rißnähe durch Röntgenkleinwinkelstreuung

Böhmert, J.; Große, M.

  • Lecture (Conference)
    29. DVM-Tagung Bruchvorgänge, Februar 1997, Stuttgart, S. 299 ff.
  • Contribution to proceedings
    29. DVM-Tagung Bruchvorgänge, Februar 1997, Stuttgart, S. 299 ff.

Permalink: https://www.hzdr.de/publications/Publ-857

Detection of metastable defective regions in ion-implanted Silicon by means of metall gettering

Kögler, R.; Posselt, M.; Yankov, R. A.; Kaschny, J.; Mücklich, A.; Skorupa, W.; Danilin, A. B.

  • Lecture (Conference)
    MRS '97, Spring Meeting, San Francisco, March 31-April 4, 1997

Permalink: https://www.hzdr.de/publications/Publ-856

Methode zur schnellen Bestimmung von Actiniden in Bauschutt zur Freigabeentscheidung

Nebelung, C.; Nitsche, H.; Bernhard, G.

  • Lecture (Conference)
    V. Stillegungskolloquium, 24./25.6.1997 in Hannover
  • Contribution to external collection
    IV. Statusbericht Stillegung und Rückbau kerntechnischer Anlagen, S. 293-301

Permalink: https://www.hzdr.de/publications/Publ-855

EXAFS Investigations of the Interaction of Humic Acids and Model Compounds with Uranyl Cations in Solid Complexes

Denecke, M. A.; Reich, T.; Bubner, M.; Heise, K.-H.; Nitsche, H.; Allen, P. G.; Bucher, J. J.; Edelstein, N. M.; Shuh, D. K.

  • Lecture (Conference)
    MIGRATION '97, Konferenz vom 26.-31. Oktober 1997 in Sendoi, Japan

Permalink: https://www.hzdr.de/publications/Publ-854

Determination of Structural Parameters od Uranyl Ions Complexed with Organic Acids using EXAFS

Denecke, M. A.; Reich, T.; Bubner, M.; Pompe, S.; Heise, K.-H.; Nitsche, H.; Allen, P. G.; Bucher, J. J.; Edelstein, N. M.; Shuh, D. K.

  • Lecture (Conference)
    ACTINIDES '97, 21.-26. September 1997 in Baden-Baden

Permalink: https://www.hzdr.de/publications/Publ-853

Validation of complex formation of CA2+; UO22+ and CO32-

Bernhard, G.; Brendler, E.; Geipel, G.; Reich, T.; Nitsche, H.

  • Poster
    MIGRATION '97, Konferenz vom 26.-31. Oktober 1997 in Sendoi, Japan
  • Poster
    Euroconference and NEA Workshop: Actinide-XAS-98, Grenoble, France, 04.-06.10.1998

Permalink: https://www.hzdr.de/publications/Publ-852

Complex formation between UO22+ and CO32- studied by Laser-Induced photoacoustic Spectroscopy

Geipel, G.; Bernhard, G.; Brendler, V.; Nitsche, H.

  • Lecture (Conference)
    MIGRATION '97, Konferenz vom 26.-31. Oktober 1997 in Sendoi, Japan
  • Radiochimica Acta 82, 59 (1998)

Permalink: https://www.hzdr.de/publications/Publ-851

Convective, absolute and global instabilities of thermocapillary-buoyancy convection in extended layers, Page Number 4187

Priede, J.; Gerbeth, G.

Permalink: https://www.hzdr.de/publications/Publ-849

Sorption of Uranium(VI) onto Phyllite

Arnold, T.; Zorn, T.; Bernhard, G.; Nitsche, H.

  • Chemical Geology 151(1998) 129-141
    DOI: 10.1016/S0009-2541(98)00075-8
    Cited 103 times in Scopus
  • Lecture (Conference)
    Workshop: The Münster Workshop on Mineral Surface Science, Münster, Germany, 18.-20.03.1998
  • Lecture (Conference)
    Workshop: Surface Reactivity Meeting, University of Manchester, Department of Earth Sciences, Manchester, UK 30.03.-01.04. 1998

Permalink: https://www.hzdr.de/publications/Publ-848

Neutral Oxorhenium(V) and Oxotechnetium(V) Complexes with a novel Amide Thiother Dithiolate Ligand derived from Cysteine

Noll, B.; Hilger, C. S.; Spies, H.; Leibnitz, P.; Dinkelborg, L.; Johannsen, B.

  • Lecture (Conference)
    Chemische Berichte, COST-Meeting, Jülich, 13.-14.11.1997

Permalink: https://www.hzdr.de/publications/Publ-847

Effects of irradiation and annealing on the microstructure of Russian VVER-440-type reactor pressure vessel steels

Große, M.; Böhmert, J.

  • Lecture (Conference)
    International conference PLIM + PLEX 1997, Prague

Permalink: https://www.hzdr.de/publications/Publ-846

The structure of 113Sn from proton and alpha-particle induced reactions

Käubler, L.; Lobach, Y. N.; Trishin, V. V.; Pasternak, A. A.; Kudojarov, M. F.; Prade, H.; Reif, J.; Schwengner, R.; Winter, G.; Blomqvist, J.; Döring, J.

Abstract

The result of in-beam investigation of 113Sn using the (p,n),
(p,3n), (alpha,n) and (alpha,2n) reactions are summarized. Excited states
have been identified until Ex=4715 MeV and JPi=(27/2-).
For a large number of levels mean lifetimes tau have been determined with
the DSA method. For the JPi=25/2+ state at Ex=4059
MeV, tau=1.0(4) ns has been measured with the gamma-RF method. The experimental
results are compared with the predictions of shell-model calculations.
Most of the positive-parity states may be considered as one- or three-quasiparticle
neutron excitations of the 2d5/2, 1g7/2, 3s1/2
and 2d3/2 shells, the negative-parity states asthe coupling
of one 1h11/2 neutron to the two- or four-quasiparticle neutron
excitations in even-mass 112Sn core. For the 25/2+
isomer the three-quasiparticle neutron configuration v(h2 11/2g-1 7/2)
has been proposed on the basis of a shell-model analysis using the mass-formula
formalism. The experimentally observed yrast states in 113 50Sn63
are compared with the corresponding states in the valence mirror nucleus
145 63Eu82 giving remarkable similarities
although the parameters for the shell-model calculations differ considerably.
The analysis of nearest.neighbour spacing distributions of experimentally
obtained 5/2+ states in 113Sn does not allow definite
conclusions about regularity or chaos.

Permalink: https://www.hzdr.de/publications/Publ-845

Resolution-enhanced spectroscopy of 81Y

Schnare, H.; Winter, G.; Käubler, L.; Reif, J.; Schwengner, R.

Abstract

The fusion-evaporation reaction 58Ni(32S,2 alpha
p ) has been used to study the neutron-deficient isotope 81Y.
Multiple particle gamma-ray coincidences have been detected by the GAMMASPHERE
array combined with the MICROBALL chrged-particle detector system. Gamma-ray
spectra with an improved resolution have been achieved from an event-by-event
determination of the nucleus recoil momentum, thus allowing a precise Doppler-shift
correction. In this way a resolution enhancement by a factor 2 was obtained
for a 1 MeV gamma line. During the analysis an Egamma - Egamma
matrix as well as an Egamma - Egamma - Egamma
cube have been used to extend the previously known level scheme to higher
spin ( I ca. 57/2 ) and excitation energy ( Ex ca. 17 MeV ).
More than 100 new gamma rays and 80 new levels have been added to the level
scheme and six new bands have been established. The interpretation of these
bands in terms of the cranking model and their comparison with similar
bands in neighboring nuclei is discussed.

Permalink: https://www.hzdr.de/publications/Publ-844

Ionenstrahlinduzierte Wachstumsprozesse amorpher Schichten in Silicium

Henkel, T.

  • Open Access Logo Forschungszentrum Rossendorf; FZR-175 (Dissertation TU Dresden); März 1997
    ISSN: 1436-3976

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Accumulation of U(VI) by Microorganisms Recovered from Uranium Mining Waste Pile

Panak, P.; Bernhard, G.; Kutschke, S.; Otto, A.; Röske, K.; Selenska-Pobell, S.; Barth, G.; Nitsche, H.

  • Poster
    Actinides '97 International Conference, 21.-26.9.1997, Baden-Baden

Permalink: https://www.hzdr.de/publications/Publ-842

Model investigations of aqueous UO2 2+/Ca 2+/humic acid complexation

Bubner, M.; Pompe, S.; Jander, R.; Heise, K.-H.; Nitsche, H.

  • Poster
    Actinides '97 International Conference, 21.-26.9.1997, Baden-Baden

Permalink: https://www.hzdr.de/publications/Publ-841

Thermochromatographic Adsorption Studies - an Approach to Metallic State Properties of the Heaviest Actinides

Hübener, S.; Taut, S.; Eichler, B.

  • Poster
    Actinides '97 International Conference, 21.-26.9.1997, Baden-Baden

Permalink: https://www.hzdr.de/publications/Publ-840

Thermochromatography of No-259

Taut, S.; Hübener, S.; Eichler, B.; Gäggeler, H. W.; Timokhin, S. N.; Zvara, I.

  • Poster
    Actinides '97 International Conference, 21.-26.9.1997, Baden-Baden

Permalink: https://www.hzdr.de/publications/Publ-839

Interaction of uranium(VI) with silicic acid in aqueous solutions by time-resolved laser-induced fluorescence spectroscopy (TRLFS)

Moll, H.; Geipel, G.; Brendler, V.; Bernhard, G.; Nitsche, H.

Permalink: https://www.hzdr.de/publications/Publ-838

A fast method for low-level actinide measurement in concrete

Nebelung, C.; Nitsche, H.; Bernhard, G.

  • Poster
    Actinides '97 International Conference, 21.-26.9.1997, Baden-Baden
  • J. Alloys and Compounds 271-273, 42 (1998)
    DOI: 10.1016/S0925-8388(98)00020-6

Permalink: https://www.hzdr.de/publications/Publ-837

Uranium speciation in waters of different uranium mining areas

Bernhard, G.; Geipel, G.; Brendler, V.; Nitsche, H.

Permalink: https://www.hzdr.de/publications/Publ-836

Uranyl carbonate complexes studied by Laser-Induced Spectroscopy

Geipel, G.; Bernhard, G.; Brendler, V.; Nitsche, H.

  • Poster
    Actinides '97 International Conference, 21.-26.9.1997, Baden-Baden

Permalink: https://www.hzdr.de/publications/Publ-835

Self-Consistent Pushing and Cranking Corrections to the Meson Fields of the Chiral Quark-Loop Soliton

Schleif, M.; Wünsch, R.; Meissner, T.

Abstract
We study translational and spin-isospin symmetry restoration for the two-flavor chiral quark-loop soliton. Instead of a static soliton at rest we consider a boosted and rotating hedgehog soliton. Corrected classical meson fields are obtained by minimizing a corrected energy functional which has been derived by semi-classical methods ('variation after projection').
We evaluate corrected meson fields in the region 300 <= M <= 600 of constituent quark masses M and compare them with the uncorrected fields. We study the effect of the corrections on various expectation values of nuclear observables such as the root-mean square radius, the axial-vector coupling constant, magnetic moments and the delta-nucleon mass splitting.
  • Open Access Logo Forschungszentrum Rossendorf; FZR-173 Preprint
    ISSN: 1436-3976
  • International Journal of Modern Physics E, Vol. 7, No. 1 (February 1998) 121-138

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Permalink: https://www.hzdr.de/publications/Publ-834

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