Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

"Online First" included
Without submitted and only approved publications
Only approved publications

31738 Publications
Blood-Brain Barrier properties in vitro as related to the neurotransmitter serotonin
Brust, P.; Matys, S.; Wober, J.; Friedrich, A.; Bergmann, R.; Ahlemeyer, B.;
  • Contribution to proceedings
    Cerebrovask. Konferenz, Paris 1995
  • Book (Authorship)
    Biology and Physiology of the Blood-Brain Barrier, edit. by Couraud, Pierre-Olivier and Scherman, Plenum Press, New York, 1996

Publ.-Id: 429 - Permalink


The influence of ion energy on the wear behaviour of titanium-implanted silicon nitride ceramics
Brenscheidt, F.; Fischer, W.; Matz, W.; Wieser, E.;
  • Surface & Coatings Technology 83 (1996) pp. 317-321

Publ.-Id: 427 - Permalink


Influence of high dose and high Energy Oxygen implantation on the mechanical surface properties of aluminium
Wieser, E.; Schöneich, J.; Richter, E.;
  • Lecture (Conference)
    SMMIB 1995, San Sebastian
  • Surface & Coatings Technology 83 (1996) pp. 290-295

Publ.-Id: 426 - Permalink


Growth and Characterization of Boron Nitride Thin Films
Plass, M.; Fukarek, W.; Kolitsch, A.; Kreißig, U.;
  • Surface and Coatings Technology 84 (1996) pp. 383-387

Publ.-Id: 425 - Permalink


Post-ion-implantation into amorphous carbon films
Kolitsch, A.; Sümmchen, L.; Ullmann, I.; Falke, U.; Heger, P.;
  • Surface and Coatings Technology 84 (1996) pp. 495-499

Publ.-Id: 424 - Permalink


Neutron Diffraction Study of Phase Transitions in the Mixed Crystal Sr0.7Ba0.3Nb2O6 Between 20 and 300 K
Prokert, F.; Savenko, B. N.; Balagurov, A. M.;
  • Ferroelectrics 188 (1996) pp. 187-199

Publ.-Id: 422 - Permalink


Ion Beam Synthesis by High Dose Tungsten Implantation into 6H-Silicon Carbide
Weishart, H.; Matz, W.; Skorupa, W.;
  • Contribution to external collection
    IC SCRM 95 in Kyoto, Japan, 18.-21.9.1995
  • Book (Authorship)
    Institute of Physics Conference Series 142(1996)3, 541-544, Silicon Carbide and Related Materials 1995 Conf., Kyoto, Japan, c 1996 IOP Pub.

Publ.-Id: 421 - Permalink


Study of the different stages of damage induced by 200 keV Ge+ ion implantation in 6H-SiC
Pacaud, Y.; Brauer, G.; Perez-Rodriguez, A.; Stoemenos, J.; Barklie, R.; Voelskow, M.; Skorupa, W.;
  • Contribution to external collection
    IC SCRM 1995, Kyoto, Japan, IOP Publishing

Publ.-Id: 420 - Permalink


Focused ion beam sputtering yield measurements for cobalt ions on silicon and related materials
Schneider, P.; Bischoff, L.; Teichert, J.; Hesse, E.;
The sputtering yield of crystalline, amorphous, and poly-silicon, as well as SiO2 and SiC, was investigated for 35 keV Co+ focused ion beam irradiation using the volume loss method. The sputtered holes were analysed by SEM and surface profiling. For crystalline silicon targets, the sputtering yield was determined as a function of the incident angle of the ions and substrate temperature.
  • Nuclear Instruments and Methods in Physics Research B 117 (1996) pp. 77-80

Publ.-Id: 419 - Permalink


Comparative Study of SIMOX Structures Using Four Analytical Techniques
Fukarek, W.; Yankov, R. A.; Skorupa, W.;
  • Surface and Interface Analysis 24 (1996) pp. 243-251

Publ.-Id: 418 - Permalink


Investigation of crack growth processes of surface-breaking cracks by ultrasound - Comparison of simulation and experiments
Bergmann, U.; Bergner, F.; Langenberg, K. J.; Hofmann, C.;
  • Poster
    1995 World Congress on Ultrasonics, Berlin, 3.-7. September 1995
  • Contribution to proceedings
    Proc. 1995 World Congress of Ultrasonics, Berlin 3. - 7. September 1995, Part 2, p. 601

Publ.-Id: 416 - Permalink


Local properties of a Hg/N2 bubbly flow injected by a single orifice in a longitudinal magnetic field
Kljukin, A.; Kolesnikov, Y.; Lielausis, O.; Platacis, E.; Skopis, M.; Eckert, S.; Gerbeth, G.;
  • Lecture (Conference)
    Int. Riga Conference on MHD, August 1995, Riga

Publ.-Id: 415 - Permalink


Stabilisation of thin liquid metal jets by magnetic field
Bucenieks, I.; Lielausis, O.; Gerbeth, G.; Falk, F.;
  • Lecture (Conference)
    Int. Riga Conference on MHD, August 1995, Riga

Publ.-Id: 414 - Permalink


Measurements of longitudinal velocity fluctuations in liquid sodium at high interaction parameters in a channel with conducting walls
Eckert, S.; Gerbeth, G.; Langenbrunner, H.; Witke, W.;
  • Lecture (Conference)
    Int. Riga Conference on MHD, August 1995, Riga

Publ.-Id: 413 - Permalink


Testing of a new experimental technique to study MHD-Associated phenomena with free liquid metal surface
Bojarevics, A.; Gelfgat, Y. M.; Gerbeth, G.;
  • Lecture (Conference)
    Int. Riga Conference on MHD, August 1995, Riga

Publ.-Id: 412 - Permalink


Gradient freeze crystal growth with optimized convection induced by a rotating magnetic field
Buhrig, E.; Wunderwald, U.; Gerbeth, G.; Gelfgat, Y. M.; Gorbunov, L.;
  • Lecture (Conference)
    Int. Riga Conference on MHD, August 1995, Riga

Publ.-Id: 411 - Permalink


Two-phase flow behaviour during a medium size cold leg LOCA test on PMK-2 (IAEA - SPE-4)
Szabados, L.; Ézsöl, G.; Perneczky, L.; Krepper, E.; Prasser, H.-M.; Schäfer, F.;
The experiment to the IAEA standard problem exercise No. 4 was carried out in April 1993 on the integral test facility PMK-2 in Budapest. It was a 3.2 mm break on the downcomer head. The high pressure injection cooling was assumed to be not available. As an accident management measure bleed and feed on the secondary side of the steam generator was applied. Research Center Rossendorf contributed to the experiment of SPE-4 by supplying needle shaped conductivity probes for the measurement of local void fractions in the primary circuit of the PMK-II test facility. In the course of the standard problem exercise No. 4 RCR contributed with posttest calculations using the thermalhydraulic code ATHLET.
The report comprises a description of the initial and boundary conditions of the test and a phenomenological description of the thermalhydraulic events during the transient. The void fraction probe signals yields valuable information for deeper understanding of the thermalhydraulic occurrences and for code validation. This was the case particularly for correction of the level measurement.
A description of the thermalhydraulic occurrences from the viewpoint of code verification is given and the results of RELAP5 (KFKI-AEKI) and of ATHLET-calculations (RCR) are compared. Referring to this description, the sensitivity of the result to main influences is investigated using the ATHLET-code.
  • Open Access LogoForschungszentrum Rossendorf; FZR-101 August 1995

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Publ.-Id: 410 - Permalink


In situ observation of the tip shape of Co-Ge liquid alloy ion sources in a high-voltage transmission electron microscope
Driesel, W.; Dietzsch, C.; Hesse, E.; Bischoff, L.; Teichert, J.;
For in situ observation in a 1 MeV TEM Co-Ge liquid alloy ion soures (LAISs) were mountet to a special specimen holder revealing the formation of the field-stabilizes Co-Ge liquid alloy cone, the change in the tip shape as a function of the ion emission current, spatial shifts of the liquid alloy cone, and microdroplet emission from Co-Ge LAISs. This has facilitated the better understanding of the ion and microdroplet emission process from Co-Ge LAISs in a large range of ion current. Below the onset voltage the shape of the tip covered with the liquid Co-Ge alloy is spherical. At the onset voltage the Tayler cone is formed. A jetlike protrusion at the cone vertex. The cone half-angle a decreases and the jet length l increases with increasing emission current le. Linear dependences of a and l on Ie are found. Emission of microdroplets is observed at the shanks behind the Tayler cone. The radius of microdroplets varied between 0.035 and 10 µm. These microdroplets are emitted in time intervals of about 0.1 s and more.
  • Journal of Vacuum Science and Technology Part B 14 (1996) 3 pp. 1621-29

Publ.-Id: 409 - Permalink


Cobalt disilicide interconnects for micromechanical devices
Teichert, J.; Bischoff, L.; Hesse, E.; Schneider, P.; Panknin, D.; Geßner, T.; Löbner, B.; Zichner, N.;
A focused ion beam system working with 35 keV Co+ ions has been used to produce CoSi2 interconnects by means of ion beam synthesis. The capability of maskness patterning of the focused ion beam, ist large depth of focus and the possibility of a dynamic focus control allow the fabrication of interconnects in three-dimensional devices with this method. Investigations have been performed using polycrystalline, amorphous and single crystalline silicon substrates. The influence of implantation does has been studied, the electrical resistance and thermal stability of the interconnects has been measured. For room temperature implantation and annealing at 600°C for 1h resistivities between 34 and 60 µ( cm have been obtained for the various substrate materials. CoSi2 interconnects have been found to be thermally stable up to 700°C. In order to demonstrate this method interconnection lines have been fabricated on the sloped walls of deep anisotropically etched grooves 280 µm.
  • Journal of Micromechanics and Microengineering 6 (1996) pp.272-278

Publ.-Id: 408 - Permalink


X-ray diffraction study of phase transitions in Sr0.39 Ba0.61 Nb2O6 between 20 and 500K
Prokert, F.; Ihringer, J.; Ritter, H.;
  • Ferroelectrics Letters 20 (1995) pp. 73-82

Publ.-Id: 407 - Permalink


The investigation of different cameras for in-beam PET imaging.
Pawelke, J.; Byars, L.; Enghardt, W.; Fromm, W.-D.; Geissel, H.; Hasch, B.-G.; Lauckner, K.; Manfraß, P.; Schardt, D.; Sobiella, M.;
In situ and in vivo treatment plan verification and beam monitoring as well as dose control during heavy-ion tumour therapy can be performed in principle by measurements of range distributions of positron-emitting nuclei by means of PET techniques. For this purpose the performance of different types of positron camera as well as the results of in-beam PET experiments using beams of positron-active ions (15O, 17F and 19Ne with energies of 300-500 AMeV) are presented. Following the deduced performance requirements a PET scanner that is designed for clinical use in experimental heavy-ion therapy at GSI Darmstadt has been built. This limited angle tomograph consists of two large-area detector heads based on position sensitive BGO detectors and is predicted to perform the measurement of the end point of a positron-emitting ion beam for the verification of a treatment plan with a precision better than 1 mm. The maximum dose applied in the patient thereby is of the magnitude of 10 mGy.
  • Physics in Medicine and Biology, Vol. 41, No. 2(1996)279-296

Publ.-Id: 406 - Permalink


Effects of nuclear Coulomb field on two-meson correlations
Barz, H.-W.;
Abstract:
The infiuence of the nuclear Coulombfield on two-pion and two-kaon correlations is investigated for sources with charge number of Z = 160. The source radii
extracted from the correlation function determined in sidewards and outwards direction are remarkably affected for meson pairs with average momenta, below 200 MeV/c.
  • Physical Review C 53 (1996) 5 pp. 2536-38
  • Open Access LogoForschungszentrum Rossendorf; FZR-125

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Publ.-Id: 405 - Permalink


Influence of the first-order polarization on the stopping power for bare charges in the jellium model
Mathar, R. J.;
Adding the contribution of the next higher order of the density parameter to the random-phase approximation (the zeroth-order, noninteracting approximation to the subceptibility) improves the calculation of the linear dielectric function of the jellium model. In this paper, the corresponding results by Holas, Aravind, and Singwi (Phys. Rev. B20 (1979) 4912) are picked up to extend the Lindhard-Winter theory of the electronic energy loss in a straightforward manner. As known from static approximations to the local-field correction, the electronic stopping at low ion velocities is enhanced. Above the stopping-power maximum, the first-order dynamic dielectric function delivers a correction of the opposite sign.
  • Physical Review A 53 (1996) 4 pp.2873-2876

Publ.-Id: 403 - Permalink


Forschungszentrum Rossendorf; Jahresbericht 1993/94
Fülle, R.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-100

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Publ.-Id: 402 - Permalink


Spontaneous fission of 244Cm studied by the two-velocities method at the FOBOS spectrometer
Kozulin, E. M.; Oganessian, Y. T.; u. a.; Aleksandrov, A. A.; Aleksandrova, I. A.; u. a.; Gippner, P.; Matthies, A.; Herbach, C.-M.; Schilling, K.-D.; u. a.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-99

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Publ.-Id: 400 - Permalink


Methodische Untersuchungen zum Einsatz der Positronen-Emissions-Tomographie in der Leichtionen-Tumortherapie.
Pawelke, J.;
kein Abstrakt
  • Open Access LogoDissertation, Technische Universität Dresden, Fakultät für Mathematik und Naturwissenschaften
    Forschungszentrum Rossendorf, FZR-97 (Juni 1995)

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Publ.-Id: 399 - Permalink


Evidence for a supershort fission mode in the reactions 242mAm(nth,f) and 244Cm(sf)
Pyatkov, Y. V.; Aleksandrov, A. A.; Andreev, B. I.; Gippner, P.; Herbach, C.-M.; Ortlepp, H.-G.; Penionzhkevich, Y. E.; Shekhmamet'Ev, R. A.; Wagner, W.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-98 Preprint

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Publ.-Id: 398 - Permalink


Erfolgsbilanz läßt Qualitätsansprüche steigen
Maletti, R.;
no abstract
  • Sonnenenergie & Wärmetechnik 1997, H.5, S.16

Publ.-Id: 397 - Permalink


Abhängigkeit der mechanischen Eigenschaften, des Bestrahlungs- und des Ausheilverhaltens von der Tiefenlage in Schmiedestücken des WWER-Reaktordruckbehälterstahles 15Ch2MFA
Böhmert, J.; Große, M.; Viehrig, H.-W.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-93 April 1995

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Publ.-Id: 396 - Permalink


Institute of Radiochemistry; Annual Report 1994
Nitsche, H.; Engelmann, H.-J.; Bernhard, G.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-94

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Publ.-Id: 394 - Permalink


In-Beam Investigation and the Structur of States in 113Sn
Käubler, L.; Döring, J.; Funke, L.; Kleinwächter, P.; Prade, H.; Reif, J.; Schwengner, R.; Winter, G.; u. a.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-95 Preprint

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Publ.-Id: 392 - Permalink


Mixed-Ligand Oxorhenium(V) comlexes with Rhenium-Selenium bonds. Molecular structure of (3-Oxapentane-1.5-Dithiolato)-(Benzeneselenolato)Oxorhenium(V)
Fietz, T.; Spies, H.; Leibnitz, P.; Scheller, D.;
  • Journal of Coordination Chemistry 38 (1996) pp. 227-235

Publ.-Id: 391 - Permalink


Bericht der Frühjahrstagung der Studiengruppe für Elektronische Instrumentierung vom 3. bis 5. April 1995 in Jülich
Gabriel, F.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-96

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Publ.-Id: 390 - Permalink


Bestimmung bruchmechanischer Kennwerte an Reaktordruckbehälterstählen mit der Einproben-Compliance-Methode und Korrelationen zur Kerbschlagarbeit
Bergmann, U.; Böhmert, J.; Viehrig, H.-W.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-81 März 1995

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Publ.-Id: 389 - Permalink


Studies to the Synthesis of 16 alpha-[18F] Fluoroestradiol
Römer, J.; Steinbach, J.; Kasch, H.;
  • Applied Radiation and Isotopes 47 (1996) 4 pp. 395-399

Publ.-Id: 388 - Permalink


Carbon-mediated effects in Si and Si-related materials
Skorupa, W.; Yankov, R. A.;
  • Materials Chemistry and Physics 44 (1996) pp. 101-144

Publ.-Id: 387 - Permalink


Conversion Electron Mössbauer Spectroscopy Studies of FeSi and FeSi2
Dobler, M.; Reuther, H.; Barradas, N.;
  • Hyperfine Interactions 1 (1996) pp. 266-269

Publ.-Id: 386 - Permalink


Evidence for diffusion-limited kinetics of ion-beam-induced epitaxial crystallization in silicon
Heera, V.; Henkel, T.; Kögler, R.; Skorupa, W.;
  • Physical Review B 52 (1995) 22 pp. 15 776-784

Publ.-Id: 385 - Permalink


Solar heat feeding into a district heating network
Rindelhardt, U.;
After one year of operation the main results of the pilot system are summerized:
- mean collector efficiency 30%
- produced solar heat 30 MWh
- system losses 15%
The reasons for the deviations of the measured values from the projected values are discussed.
  • Lecture (Conference)
    2. Deutsch-Italienische Konferenz über die Nutzung erneuerbare Energien, Brescia, Italien, 13.-16.6.1995, Tagungsband S. 241
  • Contribution to proceedings
    2. Deutsch-Italienische Konferenz über die Nutzung erneuerbare Energien, Brescia, Italien, 13.-16.6.1995, Tagungsband S. 241

Publ.-Id: 384 - Permalink


Proximity gettering of transition metals in separation by implanted oxygen structures
Skorupa, W.; Hatzopoulos, N.; Yankov, R. A.; Danilin, A.;
  • Applied Physics Letters 67 (1995) 20 pp.1-3

Publ.-Id: 383 - Permalink


Investigation of ion beam synthesized iron silicide layers by conversion electron Mössbauer spectroscopy
Dobler, M.; Reuther, H.; Betzl, M.; Mäder, M.;
  • Lecture (Conference)
    Conf. Proc. Vol. 50, "CAME" 95, Ed. I. Ortalli, SIF, Bologna 1996, 687-690
  • Contribution to proceedings
    ICAME '95, Conference Proceedings Vol. 50, Ed.: I. Ortalli, SIF Bologna, 1996, pp. 687-690

Publ.-Id: 382 - Permalink


The impact of kaon polarization in nuclear matter on the K- production in heavy-ion collisions
Kolomeitsev, E. E.; Voskresensky, D. N.; Kämpfer, B.;
  • International Journal of Modern Physics E 5 (1996) 2 pp. 313-328
  • Open Access LogoForschungszentrum Rossendorf; FZR-91 Preprint

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Publ.-Id: 381 - Permalink


Rho Meson Self-Energy and Dielectron Emissivity in an Isospin-Asymmetric Pion Medium
Gulamov, T. I.; Titov, A. I.; Kämpfer, B.;
  • Phys. Rev. D 53 (1996) 3770
  • Open Access LogoForschungszentrum Rossendorf; FZR-90 Peprint
  • Physics Letters B 372 (1996) pp. 187

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Publ.-Id: 380 - Permalink


Dilepton production in a chemically equilibrating, expanding and hadronizing quark-gluon plasma
Kämpfer, B.; Pavlenko, O. P.; Peshier, A.; Soff, G.;
  • Physical Review C 52 (1995) pp. 2704
  • Open Access LogoForschungszentrum Rossendorf; FZR-89 Preprint

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Publ.-Id: 378 - Permalink


Technetium(V) and Rhenium(V) Complexes for 5-HT2A Serotonin Receptor Binding: Structure-Affinity Considerations
Johannsen, B.; Scheunemann, M.; Spies, H.; Brust, P.; Wober, J.; Syhre, R.; Pietzsch, H.-J.;
  • Journal of Nuclear Medicine and Biology 23 (1996) 429-438

Publ.-Id: 377 - Permalink


Massive quasiparticle model of the SU(3) gluon plasma
Peshier, A.; Kämpfer, B.; Pavlenko, O. P.; Soff, G.;
  • Physical Review D 54 (1996) 3 pp. 2399-2402
  • Open Access LogoForschungszentrum Rossendorf; FZR-106 Preprint

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Publ.-Id: 376 - Permalink


Plasma Immersion Ion Implantation as a simple Method of Ion Implantation into Metals
Brutscher, J.; Günzel, R.;
  • Lecture (Conference)
    AMPT '95

Publ.-Id: 375 - Permalink


Sheath Dynamics in Plasma Immersion Ion Implantation
Brutscher, J.; Günzel, R.; Möller, W.;
  • Plasma Sources Science and Technology 5 (1996) pp. 54-60
  • Surface & Coatings Technology 85 (1996) pp. 98-104

Publ.-Id: 373 - Permalink


CEMS Studies on Iron Silicides
Reuther, H.; Lange, H.; Dobler, M.; Schumann, J.;
  • Lecture (Conference)
    Conf. Proc. Vol. 50, "CAME" 95, Ed. I. Ortalli, SIF, Bologna 1996, 573-576
  • Contribution to proceedings
    ICAME '95, Conference Proceedings Vol. 50, Ed.: I. Ortalli, SIF Bologna, 1996, pp.573-576
  • Contribution to external collection
    Conf. Proc. Vol. 50, "CAME" 1995, Ed. I. Ortalli, SIF, Bologna 1996, 573-576

Publ.-Id: 371 - Permalink


Ion Drift Behaviour in Borosilicate Glasses during Anodic Bonding to Silicon or Metals
Lange, K.; Grigull, S.; Kreißig, U.; Schmidt, B.; Harz, M.;
  • Contribution to proceedings
    Proceedings of the 3rd International Symposium on Semiconductor Water Bonding, Proceedings-Volume 97-7 (The Electrochemical Society Inc., Pennington, New Jersey, 1995)

Publ.-Id: 370 - Permalink


Experimentelle Modalanalyse an einer Kühlschleife eines Druckwasserreaktors
Altstadt, E.; Richter, K.; Weiß, R.; Zimmermann, W.;
  • Other report
    TUD - Sonderdruck zum Vortrag in Schmochtitz

Publ.-Id: 367 - Permalink


Submicron CoSi2-structures fabricated by focused ion beam implantation and local flash lamp melting
Bischoff, L.; Heinig, K.-H.; Teichert, J.; Skorupa, W.;
A new way to fabricate submicron CoSi2 structures on Si wafers is presented. The method consists of a combination of focused ion beam (FIB) implantation of Co+ ions and subsequent flash lamp irradiation. With our FIB equipment IMSA-100 one- and two dimensional structures were implanted by writing with a 35 keV Co+ beam which was focused to a spot diameter of 200nm. However, for the porposed method the spot size is not the crucial dimension because the final structure size is controlled by a local melting and recrystallization process in the implanted regions. Here the structure size is determined by the amount of implanted atoms which can be concentrated by the local melting process into the submicron CoSi2 structures. The local melting is caused by heteronucleation at the Si wafer surface during the short period of superheating, which is obtained by intense flash lamp irradiation of 3 or 20 ms duration. Disintegration of implanted CoSi2 wires by precipitate formation during thermal annealing, which was reported by Liddle et al. (Mater. Res. Soc. Symp. Proc. 279 (1993) 881), can be avoided by this method. The CoSi2 structures were analysed by scanning electron microscopy (SEM) and energy dispersiv X-ray analysis (EDX). Dots and wires of about 200 nm diameter and width, respectively, have been fabricated during these first experiments, whilst smaller dimensions seem to be possible in future.
  • Nucl. Instr. And Methods in Phys. Res. B112 (1996) 201-205
  • Nuclear Instruments and Methods in Physics Research B 112 (1996) pp. 201-205

Publ.-Id: 366 - Permalink


Rhenium(V) gluconate, a suitable precursor for the preparation of rhenium(V) complexes
Noll, B.; Knieß, T.; Friebe, M.; Spies, H.; Johannsen, B.;
  • Isotopes Environmental Health Studies 32 (1996) pp. 21-29

Publ.-Id: 365 - Permalink


Basic Hydrolysis of 2-(18F)Fluoro-1,3,4,6-tetra-0-acetyl-D-glucose in the Preparation of 2-(18F)Fluoro-2-deoxy-D-glucose
Füchtner, F.; Steinbach, J.; Mäding, P.; Johannsen, B.;
  • Applied Radiation and Isotopes 47 (1996) 1 pp. 61-66

Publ.-Id: 364 - Permalink


Synthesis and characterization of uranyl-orthosilicate (UO2)2SiO4 2H2O
Moll, H.; Matz, W.; Schuster, G.; Brendler, E.; Bernhard, G.; Nitsche, H.;
  • Journal of Nuclear Materials 227 (1995) pp. 40-49

Publ.-Id: 361 - Permalink


Capillary electrophoresis for a "finger-print"-characterization of fulvic and humic acids
Pompe, S.; Heise, K.-H.; Nitsche, H.;
  • Journal of Chromatography A 723 (1996) pp. 215-218

Publ.-Id: 360 - Permalink


Improvement of hardness, wear and corrosion behaviour of magnesium by ion implantation
Chudoba, T.; Richter, E.; Schneider, M.;
  • Contribution to external collection
    9th Int. Conf. on IBMM, Canberra, Australia, 5-10 Feb. '95, Ion Beam Modi. of Mat., Eds: J.S. Williams, R.G. Elliman, M.C. Ridgway, c '96 pp.1008-1011

Publ.-Id: 359 - Permalink


Design Considerations for Plasma Immersion Ion Implantation Systems
Mändl, S.; Brutscher, J.; Günzel, R.; Möller, W.;
  • Nuclear Instruments and Methods in Physics Research B 112 (1996) pp. 252-254

Publ.-Id: 358 - Permalink


Inherent Possibilities and Restrictions of Plasma Immersion Ion Implantation Systems
Mändl, S.; Brutscher, J.; Günzel, R.; Möller, W.;
  • Journal of Vacuum Science and Technology. Part B 14 (1996) 4 pp. 2701-2706

Publ.-Id: 357 - Permalink


Betriebserfahrungen mit einer 100-m2-Solaranlage zur Trinkwasserbereitung und Fernwärmeeinspeisung
Brünig, D.; Rindelhardt, U.;
Die Ergebnisse des ersten zehn Betriebsmonate der Solaranlage Freital werden vorgestellt. Bei einem Kollektornutzungsgrad von 29% wurde ein Ertrag von 264 kWh/m² erreicht. Für das erste volle Betriebsjahr wird ein Wert von 327 kWh/m² erwartet. Mehr als 2/3 der erzeugten Solarwärme wurde in das Fernwärmenetz eingespeist, der Rest diente der Warmwasserbereitung einer Schule.
  • Lecture (Conference)
    5. Symposium Thermische Solarenergie, Staffelstein, 21.-26. Juni 1995, Tagungsband S.133
  • Contribution to proceedings
    5. Symposium Thermische Solarenergie, Staffelstein, 21.-26. Juni 1995, Tagungsband S.133

Publ.-Id: 356 - Permalink


Ermittlung der Neutronendosis von bestrahlten WWER-Reaktordruckbehältermaterialien
Barz, H.-U.; Böhmer, B.; Konheiser, J.; Stephan, I.;
In this report is described the theoretical and experimental determination of all needed parameters for the neutron exposure of the different specimens that were irradiated in the Rheinsberg reactor within the period from 1984 until 1988 to obtain data for neutron embrittlement studies.
The methodical approach is represented, possible sources of errors are discussed and all the needed results are collected. The work can be divided into a pure calculation part, into the description of the extraction of the monitors and their gamma spectrometric analysis and into the discussion of the spectrum adjustment procedure which combines experimental and theoretical results. Therefore, this representation deals not only with this special task but gives also a survey about the methodical approach and the state of art in Rossendorf for the general problem of determination of neutron fluences, because the developed methods are generally applicable and not limited to the special problem of neutron embrittlement. Different problems with respect of neutron fluences exist also in Germany.
The calculation of fluences is based on an accurate description of the history of the reactor for all irradiation periods, i.e. the time and space dependence of burnup, power and fisson sources. This information was given for a time and space grid of all fuel elements.
For the calculation of the fluences were not used time dependent fluxes, but at first integral sources of fission neutrons are calculated for different fissionable isotopes. Using these given integral source distributions the fluences were calculated and the results from the different fissionable source were composed. For the improvement of the comparison between experimental and theoretical results a special method was used calculating special integral sources for the given detector, because each detector according to its decay notes another integral source resp. flux distribution, which has to be theoretically corrected.
The basis of all transport calculations was the Monte Carlo method in a special problem adjusted kind. Special procedures were developed and successfully applicated for the reduction of statistical errors. Therefore, also for single specimens results with small statistical errors were obtained. It is remarkable that this accurate method which allows a realistic 3-dimensional description of the system reactor-surroundings could be applied with reasonable calculation times for the great number of needed calculations.
  • Open Access LogoForschungszentrum Rossendorf; FZR-87 Juni 1995

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Publ.-Id: 355 - Permalink


Recombination of nonequilibrium charge carriers in heavy ion tracks in silicon
Eremin, V.; Ilyashenko, I. N.; Strokan, N.; Schmidt, B.;
  • Nuclear Instruments and Methods in Physics Research A 377 (1996) pp. 184-190
  • Poster
    Tagung: 7th European Symp. on Semiconductor Detectors, 7.-10. Mai 1995, Schloß Elmau

Publ.-Id: 354 - Permalink


The application of high energy ion implantation for silicon radiation detectors
von Borany, J.; Schmidt, B.; Grötzschel, R.;
  • Nuclear Instruments and Methods in Physics Research A 377 (1996) pp. 514-520
  • Lecture (Conference)
    oral presentation during, 7th European Symposium on Semiconductor Detectors, Schloß Elmau, 7.-10.5.1995

Publ.-Id: 353 - Permalink


Aufbau eines behördlichen Fernüberwachungssystems zur betrieblichen Überwachung des KKW Saporoshje, Block 5, 1. Realisierungsstufe
Beyer, M.; Carl, H.; Schikora, B.; Seidel, A.; Schumann, P.; Zschau, J.;
The technical equipment required to improve the operational monitoring of the NPP Zaporozh'ye, Ukraine is represented. it includes two measuring lines for the upgrading of the operational measuring equipment and seven computer-engineering components for establishing an on-site NPP supervision and has been specified in accordance with NPP experts and specialists of the Ukrainian State Supervisory Authority. Furthermore, the results of practical tests are described to check the hard- and software suitability for the down loading of measuring data from an operational computer using an original SM-2M computer made in Russia and a simulator in the laboratory. To prove the exact function a special laboratory variant of the coupling receiver software was been developed. Conceptional proposals for the algorithmic realization of the on-site monitoring of the NPP Zaporozh'ye conclude this report.
  • Open Access LogoForschungszentrum Rossendorf; FZR-88 Mai 1995

Publ.-Id: 350 - Permalink


Vibration Experiments at a Coolant Loop of the Dukovany NPP
Altstadt, E.; Weiß, F.-P.; Weiß, R.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-86 April 1995

Publ.-Id: 349 - Permalink


Freimessung von Bauschutt - Low-Level-Messung alphastrahlender Nuklide
Hübener, S.; Nebelung, C.; Bernhard, G.;
  • Lecture (Conference)
    Seminar des Instituts für Strahlenphysik der TU Dresden, 27.04.1995, Dresden
  • Other report
    Schlußbericht zum Fördervorhaben BMBF 02 S 7442 2, Berichtszeitraum: 1.3.92 - 31.5.1995

Publ.-Id: 348 - Permalink


Specific binding of (3H)imipramine indicates the presence of a specific serotonin transport system on endothelial cells of porcine brain
Brust, P.; Bergmann, R.; Johannsen, B.;
  • Neuroscience Letters 194 (1995) 21-24

Publ.-Id: 347 - Permalink


Point defect-based modeling of diffusion and electrical activation of ion implanted boron in crystalline silicon
Jäger, H.-U.;
  • Contribution to proceedings
    Mat. Res. Soc. Symp., MRS Spring Meeting 1995, San Francisco
  • Journal of Applied Physics 78 (1), 1 July 1995, 176-186

Publ.-Id: 346 - Permalink


Complete recrystallization of amorphous silicon carbide layers by ion beam irradiation
Heera, V.; Kögler, R.; Skorupa, W.; Stoemenos, J.;
  • Applied Physics Letters 67 (1995) 14 pp. 1999-2001

Publ.-Id: 345 - Permalink


Application of the Pulse-Shape Technique to Proton-Alpha Discrimination in Si-Detector Arrays
Pausch, G.; Moszynski, M.; Wolski, D.; Bohne, W.; Grawe, H.; Hilscher, D.; Schubart, R.; de Angelis, G.; de Poli, M.;
  • Nuclear Instruments and Methods in Physics Research A 365 (1995) pp. 176-184
  • Open Access LogoForschungszentrum Rossendorf; FZR-85 Preprint

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Publ.-Id: 343 - Permalink


Thermocapillary bubble migration at high Reynolds and Marangoni numbers under low gravity
Galindo, V.; Gerbeth, G.; Treuner, M.; Langbein, D.; Rath, H. J.;
  • International Journal of Colloid and Interface Science, vol. 179, No. 1, pp. 114 - 127 (1996)

Publ.-Id: 342 - Permalink


A Vibration Model for the Primary Circuit of VVER-440 type Reactors Based on Finite Elements
Altstadt, E.; Scheffler, M.; Weiß, F.-P.;
  • Lecture (Conference)
    Tagung: SMIRT 13, Structural Mechanics in Reactor Technology, Porto Alegre, Brasil, August 13 - 18, 1995, Vol. 2, pp. 323 - 328

Publ.-Id: 341 - Permalink


Theoretical Vibration Model of VVER Reactors Considering Fluid-Structure-Interaction
Altstadt, E.; Grunwald, G.; Scheffler, M.; Weiß, F.-P.;
A finite-element-model describing the mechanical vibrations of the whole VVER-440 primary circuit is being developed to support the early detection of mechanical component faults. A special fluid-structure-element was developed to consider the reaction forces of the fluid in the downcomer upon the moving core barrel and the rector pressure vessel. It was derived from an approximated analytical 2D-solution of the coupled system of 3D fluid equations and the structural equations of motions. By means of the vibration model all eigenfrequencies up to 30 Hz and the corresponding mode shapes were calculated. It is shown that the fluid-structure-interaction strongly influences those modes exhibiting a relative displacement between reactor pressure vessel and core barrel. Moreover, by means of the model the shift of eigenfrequencies due to the degradation or to the failure of internal clamping and spring elements was investigated. By comparing the frequency spectra of the normal and of the faulty structure, it could be shown that a recognition of such degradations and failures even inside the reactor pressure vessel is possible by pure excore vibration measurements.
  • Lecture (Conference)
    Tagung: SMORN VII, Avignon, France, 19 - 23 June 1995
  • Contribution to proceedings
    Tagung: SMORN VII, Avignon, France, 19 - 23 June 1995, Vol. 2, 9.7
  • Other report
    Forschungszentrum Rossendorf; März 1995, Preprint of SMORN VII

Publ.-Id: 340 - Permalink


Acoustic Leak Monitoring with Neural Networks at Complicated Structures
Hessel, G.; Schmitt, W.; Weiß, F.-P.;
  • Lecture (Conference)
    Tagung: SMORN VII, Avignon, France, 19 - 23 June, 1995, 4.11
  • Contribution to proceedings
    SMORN VII - A Symposium on Nuclear Reactor Surveillance and Diagnostics, OCDE/OECD Press, Paris, 1996, Vol. 1, pp. 359-366

Publ.-Id: 339 - Permalink


Specification of a Technical System to improve the Operational Monitoring of the Zaporosh'ye NPP by the State Supervisory Authority of the Ukraine
Beyer, M.; Carl, H.; Langer, L.; Schumann, P.; Seidel, A.; Zschau, J.; Nowak, K.; Tolksdorf, P.;
In order to improve the operational surveillance of a VVER-1000 unit of the Ukrainian nuclear power plant Zaporosh'ye a technical monitoring system has been specified. The system will enable the state regulatory and supervisory bodies to survey the unit operation independently of operators to assess its safety status, and to impose appropriate conditions. Due to its up-to-date configuration the system provides early indication of any operational incident and emission of radioactive materials connected. Based on the system an immediate warning in emergency situations is possible as well as an effective emergency management. For this purpose 49 different operational parameters of the unit, 18 radiological parameters of the unit and the plant site and 6 meteorological parameters are monitored.
  • Lecture (Conference)
    SMORN VII Conference, 7th Symposium on Nuclear Reaktor Surveillance and Diagnostics, Avignon, France, 19.-23. June 1995, Vol. 2, 14.3

Publ.-Id: 338 - Permalink


Threshold phenomena in an open quantum mechanical system
Persson, E.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-83

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Publ.-Id: 337 - Permalink


Weiterentwicklung und Verifikation eines dreidimensionalen Kernmodells für Reaktoren vom Typ WWER und seine Ankopplung an den Störfallcode ATHLET
Grundmann, U.; Lucas, D.; Mittag, S.; Rohde, U.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-84 März 1995

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Publ.-Id: 336 - Permalink


Zur Herausbildung verschiedener Zeitskalen beim Zerfall von Compoundkern-Resonanzen als Folge des Trapping-Effekts
Müller, M.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-79 (Dissertation)

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Publ.-Id: 335 - Permalink


Zeitaufgelöste laserinduzierte Fluoreszenzspektroskopie an Huminsäuren und Untersuchung der Komplexbildung mit umweltrelevanten Schwermetallen
Brachmann, A.; Geipel, G.; Bernhard, G.; Pompe, S.; Bubner, M.; Nitsche, H.;
  • Poster
    25. Hauptversammlung der GDCh vom 10.-13.9.1995 in Münster

Publ.-Id: 334 - Permalink


Synthese und Charakterisierung von Uranylsilicat Dihydrat, (UO2)2SiO4 2H2O
Moll, H.; Matz, W.; Schuster, G.; Brendler, E.; Bernhard, G.; Nitsche, H.; Reich, T.;
  • Poster
    25. Hauptversammlung der GDCh vom 10.-13.9.1995 in Münster, Themenbereich: Anorganische Chemie

Publ.-Id: 333 - Permalink


First observation of inelastic X-ray scattering from condensed 4He using high energy resolution
Schell, N.; Simmons, R. O.; Burkel, E.;
Recently, the suitability of inelastic X-ray scattering for the investigation of solid and fluid 4HE has been demonstraded. For the text experiments an energy resolution of the order of 10-15 meV was used at the backscattering spectrometer INELAX at the storage ring DORIS of DESY, Hamburg. Lattice excitations were observed for momentum transfers along the c axis of h.c.p. helium crystals which were grown in situ at pressures of 54-63 Mpa and at temperatures of 4.2-6.4 K. At 10 k abowve the melting point, engery-loss signals could also be detected from the liquid helium at equivalent momentum transfers.
  • Journal of Synchrotron Radiation (1996). 3, 316-317

Publ.-Id: 332 - Permalink


Investigation of microbial degradation of PCB congeners using isotopically modified tracers
Bubner, M.; Heise, K.-H.; Nitsche, H.; Matucha, M.; Sasek, V.; Veleminsky, J.; Spizek, J.;
  • Lecture (Conference)
    7th Intern. Conf. Bioindicators (Abstr.)
  • Ecological Chem. St. Petersburg, Russia 1997, 6(3): 204-211

Publ.-Id: 331 - Permalink


Synthesis of uniformly 13C and 14C-Labelled PCB-Congeners
Bubner, M.; Meyer, M.; Fuksova, K.; Matucha, M.; Heise, K.-H.; Nitsche, H.;
  • Poster
    7th Intern. Conf. Bioindicators
  • Ecological Chem. St. Petersburg, Russia, 1998, 7(1):65-68

Publ.-Id: 330 - Permalink


Bestimmung der Speziation des Uraniums mittels Zeitaufgelöster Laserinduzierter Fluoreszenzspektroskopie
Geipel, G.; Brachmann, A.; Brendler, V.; Bernhard, G.; Nitsche, H.;
  • Lecture (Conference)
    Anakon '95

Publ.-Id: 329 - Permalink


Comparision of CoSi2 Interconnection Lines on Crystalline and Noncrystalline Silicon Fabricated by Writing Focused Ion Beam Implantation
Teichert, J.; Bischoff, L.; Hesse, E.; Schneider, P.; Panknin, D.; Geßner, T.; Löbner, B.; Zichner, N.;
A focused beam of Co+ ions has been used to produce CoSi2 interconnects by means of ion beam synthesis. Investigations have been performed using polysilicon, amorphous and crystalline silicon substrates. The influence of implantation dose and annealing temperature on the resistivity has been studied. For room temperature implantation and annealing 600°C for 1h, a resistivity of about 60µ(*cm has been obtained independent of the subtrate type. The CoSi2 layers have been found to be stable up to 700°C. CoSi2 interconnects have been fabricated on the slope walls of 200µm deep anisotropically etched grooves using a dynamic focus control of the focused ion beam.
  • Applied Surface Science 91 (1995) pp. 44-49
  • Lecture (Conference)
    MAM '95

Publ.-Id: 326 - Permalink


MHD Turbulence: Use of gas bubbles as local tracers in Liquid Metal MHD Flows
Eckert, S.; Gerbeth, G.; Witke, W.; Langenbrunner, H.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-80

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Publ.-Id: 325 - Permalink


Gaschromatographie mit W-Isotopen in ...
Vahle, A.; Hübener, S.; Böttger, H.; u. a.;
  • Lecture (Conference)
    3. Workshop "Chemie der schwersten Elemente", 15.-17.3.1995 in Mainz

Publ.-Id: 324 - Permalink


Isotherme on-line Hochtemperatur-Gaschromatographie der Elemente der 6. Gruppe in feuchtem Sauerstoff - Testexperimente mit OLGA II
Hübener, S.;
  • Lecture (Conference)
    3. Workshop "Chemie der schwersten Elemente", 15.-17.3.1995 in Mainz

Publ.-Id: 323 - Permalink


Ein Hybrid-Modell zur Untersuchung von Stößen schwerer Ionen bei mittleren Energien
Heide, B.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-108 (Dissertation)

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Publ.-Id: 322 - Permalink


Evaporation Rates for Liquid Clusters
Frauendorf, S.;
  • Zeitschrift für Physik D 35 (1995) pp. 191
  • Open Access LogoForschungszentrum Rossendorf; FZR-82 Preprint

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Publ.-Id: 321 - Permalink


Institute of Ion Beam Physics and Materials Research; Annual Report 1994
Möller, W.; Wieser, E.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-77

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Publ.-Id: 320 - Permalink


Level repulsion in the complex plane
Müller, M.; Dittes, F.-M.; Iskra, W.; Rotter, I.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-70 Preprint
  • Physical Review E 52 (1995) pp. 5961

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Publ.-Id: 319 - Permalink


1% Cold leg break experiment on PMK-2 Test results and computer code analysis
Ézsöl, G.; Guba, A.; Perneczky, L.; Prasser, H.-M.; Schäfer, F.; Krepper, E.;
In the framework of the computer code assessment programme for the VVER-440 type Paks Nuclear Power Plant a 1% cold leg break experiment has been conducted on the PMK-2 integral type test facility. It was followed by calculations using RELAP 5Mod3.1 and ATHLET in order to assess code capabilities. This experiment was started from the nominal operational parameters and it was considered that only the high pressure injection system (HPIS) is available and there is no injection from the safety injection tanks (SIT). This experiment was the repetition of the test measured in 1990 with improved data aquisition system. The first part of this report includes a short description of the facility, the measurement description, the test results including the local void measurement and a short interpretation of the main phenomena. In the second part of the report the analysis performed by the RELAP 5Mod3.1 and ATHLET Mod1.1 Cycle A codes are given.
  • Open Access LogoForschungszentrum Rossendorf; FZR-76 March 1995

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Publ.-Id: 318 - Permalink


Institute of Nuclear and Hadron Physics; Annual Report 1994
Prade, H.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-78

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Publ.-Id: 317 - Permalink


Ag+ sensitive membran in sub-µm thickness prepared by ion implantation
Möller, D.; Pham, T.; Hüller, J.; Albrecht, J.;
AG2S embedded into a 100 nm thin film of SiO2 was fabricated synthetically from ist constituents by ion implantation. The ion sensing characteristics of such film material for Ag+ were shown to be analogous to conventional bulk materials, giving sensitivities <=59 mV per concentration decade.
  • Analytica Chimica Acta (short communication), 306 (1995) 1-4

Publ.-Id: 316 - Permalink


Possible Impacts of Phosphate Influx on the Uranium Speciation and Migration in Seepage Waters
Brendler, V.; Geipel, G.; Bernhard, G.; Nitsche, H.;
  • Poster
    "International Conference and Workshop Uranium-Mining and Hydrogeology"
  • Contribution to proceedings
    Intern. Conf. Workshop "Uranium Mining and Hydrogeology", 01.10.1995, Freiberg, Germany, Köln: Sven v. Loga, 61

Publ.-Id: 315 - Permalink


Das Quark-Gluon-Plasma mit thermischen Partonenmassen und Konsequenzen des Modells für die thermische Dileptonenemission
Peshier, A.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-75

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Publ.-Id: 314 - Permalink


Proceedings of the FOBOS workshop '94
Wagner, W.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-65

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Publ.-Id: 313 - Permalink


Institute of Bioinorganic and Radiopharmaceutical Chemistry; Annual Report 1994
Johannsen, B.;
  • Open Access LogoForschungszentrum Rossendorf; FZR-73

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Publ.-Id: 312 - Permalink


Leckdetektion an komplizierten dreidimensionalen Topologien
Hessel, G.; Schmitt, W.; Weiß, F.-P.;
The well-known methods of the acoustic leak localization using the attenuation differences or propagation time differences (e.g. cross correlation analysis) are restricted to the linear geometry of pipe lines. At complicated three-dimensional topologies they fail because there are several modes of the structure-borne sound that have different propagation velocities and because numerous connecting branches generate multiple sound reflexion. Therefore, a new method for detecting and localizing the leaks at complicated geometrical structures was developed and experimentally proved at an original facility. This approach is based on the detection of the leak induced airborne sound or structure-borne sound as well as on the application of pattern recognition procedures. The efficiency both of Fuzzy Logic and neural networks for the acoustic leak localization could be experimentally proved. Though the method has been prototypically developed for Russian pressurized water reactors of VVER-440 type, it can also be used by the self-learning capability of the classifiers at other pressurized facilities.
  • Open Access LogoForschungszentrum Rossendorf; FZR-67 Januar 1995
  • Other report
    Abschlußbericht des SMWK-Forschungsvorhabens, FKZ 7541.83 - FZR/2 (1995), S. 1-15

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Publ.-Id: 311 - Permalink


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