Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

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42141 Publications

Physical Aspects of Precise Spectrometry of alpha-particles with pn-Junction Detetors

Verbitskaya, E.; Eremin, V.; Strokan, N.; Kemmer, J.; Schmidt, B.; von Borany, J.

Abstract

Investigations of energy and charge losses have been carried out for silicon planar alpha-particle detectors. The detectors were manufactured by an advanced technology, using ion implantation and various anealing temperatures. A deteiled analysis of the recombination processes in alpha-particle tracks with a high electron-hole density and a measurement procedure for the main parameters of charge carrier loss have been developed. The procedure consists in the measurement of the pulse amplitude deficit as a function of the reverse bias voltage and the tilting angle as well as in a special treatment for the determination of carrier lifetimes, surface recombination velocities and dead layers. The experimental data show a reduction of the dead leyer to 200 A, and of the energy resolution to 9-9.5 keV. The explanation implies possible changes of the doping profile due to acceptor diffusion under thermal treatment and the corresponding modification of the built-in field in the p+-layer. This effect suppresses the surface and Auger recombination of non-equilibrium carriers in tracks of alpha-particles.

  • Nuclear Instruments and Methods in Physics Research B 84 (1994) 51-61

Permalink: https://www.hzdr.de/publications/Publ-45


Ion Beam Induced Amorphization and Epitaxial Crystallization of 6H-SiC

Heera, V.; Kögler, R.; Skorupa, W.; Glaser, E.; Bachmann, T.

  • Poster
    ECAART '93, Orleans, France

Permalink: https://www.hzdr.de/publications/Publ-44


Electrochemical Etch Stop Behaviour on Ion Implanted Silicon pn-Junctions

Schmidt, B.

  • Lecture (Conference)
    Micro System Technologies Russia, 21.-24 Juni 1993, St. Petersburg

Permalink: https://www.hzdr.de/publications/Publ-43


Simulation of high-dose ion implantation-induced transient diffusion and of electrical activation of boron in crystalline silicon

Jäger, H.-U.

  • Contribution to external collection
    Simulation of Semiconductor Devices and Processes, vol. 5, editors: S. Selberherr, H. Stippel and E. Strasser, Springer-Verlag Wien, 1993, p. 137-140
    DOI: 10.1007/978-3-7091-6657-4_33

Permalink: https://www.hzdr.de/publications/Publ-42


Investigations on Content and Distribution of Uranium and Radionuclides in an Early Wismut-Rockpile in Schlema

Geipel, G.; Thieme, M.; Bernhard, G.; Baraniak, L.

  • Poster
    Altlastensanierung 93, Berlin, Mai 1993

Permalink: https://www.hzdr.de/publications/Publ-41


Separation of Radionuclides from a fission product solutron by ionexchange on alumina

Bernhard, G.

Permalink: https://www.hzdr.de/publications/Publ-40


Selforganization in the Nuclear System: II. Formation of a New Order

Iskra, W.; Müller, M.; Rotter, I.

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Permalink: https://www.hzdr.de/publications/Publ-39


Fluidic microcell with sensor array in Si-glass technology

Pham, T.; Howitz, S.

  • Contribution to external collection
    Conf. Transducers 1993, Yokohama (Bearbeitung wird bis 4.6.93 abgeschlossen, danach Veröffentlichung mögl.)

Permalink: https://www.hzdr.de/publications/Publ-37


The Influence of Chemical Interactions between Fission Products and Wall Material on the Aerosol Behavior in a Thermal Gradient Tube

Funke, H.; Kourti, N.; Bieder, U.

  • Lecture (Conference)
    Konferenzbeitrag, European Aerosol Conference 1993

Permalink: https://www.hzdr.de/publications/Publ-36


Ein Vergleich zwischen assoziativen Korrelationsmatrizen und assoziativen Tensoren mit Bezug zur optimalen Signalschätzung

Hoppe, D.

  • Other report
    Forschungszentrum Rossendorf; Laborbericht Mai 1993, Institut für Sicherheitsforschung

Permalink: https://www.hzdr.de/publications/Publ-35


Neutron and X-ray Investigations on the Oxigen Bonding in YBa2Cu30(7-x) combined with Physico-chemical Methods

Große, M.; Schuster, G.; Teske, K.; Anwand, W.; Henkel, K.

Abstract

The occupancy of the oxygen lattice positions at different annealing conditions in Yba2Cu3O(7-x) were determined by Rietveld refinements using neutron and X-ray diffraction data. The occupation density for the oxygen positions O1 to O4 were ascertained. The values of the oxygen content of the samples from this method were compared with those measured by thermoanalysis. The O1 and O4 oxygen atoms are exchangeable by thermal treatment. The oxygen in the planes is fixed and cannot be removed by thermal treatment up to 935oC. The binding strength of O1 in the lattice is stronger than that of O4 atoms; this is demonstrated by a higher temperature of dissociation of the O1 atoms. The amount of the oxygen taken up is not exactly equal to the oxygen actually in the lattice positions. In the temperature region below 400oC adsorption and chemisorption processes become dominant.

  • Fresenius Zeitschrift für Analyt. Chemie 349 (1994) 1-3 pp. 231-233
    DOI: 10.1007/BF00323290
  • Poster
    7. Tagung Festkörperanalytik, Chemnitz, 19. - 23. Juni 1993

Permalink: https://www.hzdr.de/publications/Publ-34


Thermochromatographische Experimente zur Oxidgaschemie von Molybdän und Wolfram

Hübener, S.

  • Lecture (Conference)
    2. Workshop, Chemie schwerster Elemente, Solothurn, Schweiz, 25.-27.5.1993

Permalink: https://www.hzdr.de/publications/Publ-33


Probleme bei der Durchführung und Auswertung von Thermochromatographie-Experimenten

Roß, A.

  • Lecture (Conference)
    2. Workshop, Chemie schwerster Elemente, Solothurn, Schweiz, 25.-27.5.1993

Permalink: https://www.hzdr.de/publications/Publ-32


Theoretische Probleme bei der Auswertung von Thermochromatographie-Experimenten

Funke, H.

  • Lecture (Conference)
    2. Workshop, Chemie schwerster Elemente, 25.-27.5.1993, Solothurn, Schweiz

Permalink: https://www.hzdr.de/publications/Publ-31


Neutronic Problems of a Compact 14 MeV Plasma Neutron Source

Kumpf, H.; Noack, K.; Kramoperov, V. G.

Abstract

Neutronic problems connected with the design of a compact 14MeV neutron source for fusion material research based on a plasma mirror are treated. In particular it has been demonstrated, that further construction efforts are necessary to comply with the established radiation limits for the magnetic system. Further it ist not possible to raise the useful high energy flux by arranging reflectors. If one of the source areas of the machine is equipped with a moderator, a thermal neutron source with a flux of about 5 1014 n cm-2 s-1 can be achieved.

  • Open Access Logo Forschungszentrum Rossendorf; FZR 93-11
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-30


Ein Einstufenverfahren zur Synthese von [1,2 14c] Trichloressigsäure, ausgehend von [1,2 14c] Natriumacetat

Bubner, M.; Herse, K.; Vlasakova, V.; Fuksova, K.

  • Lecture (Conference)
    3. Arbeitstagung des IIS, Bad Soden 1993

Permalink: https://www.hzdr.de/publications/Publ-29


A study of exicted states in 85 Kr and 86Kr: Evidence for neutron-core excitations in the N=50 nucleus 86Kr

Winter, G.; Schwengner, R.; Reif, J.; Prade, H.; Funke, L.; Wirowski, R.; Nicolay, N.; Dewald, A.; von Brentano, P.; Grawe, H.; Schubart, R.

Permalink: https://www.hzdr.de/publications/Publ-28


Modellexperimente zur gaschemischen Charakterisierung des Elementes 106

Hübener, S.; Roß, A.

  • Lecture (Conference)
    Seminar des Institutes für Kernchemie der J.-Gutenberg-Universität Mainz, 21.04.1993

Permalink: https://www.hzdr.de/publications/Publ-27


Photon production in an expanding gluon-enriched plasma

Kämpfer, B.; Pavlenko, O. P.

Abstract

Photon production in an expanding gluon plasma with initially little quark admixture
is considered. Photons are created by lowest order a, processes which include quarks.
Chemical equilibration of the quarks in turn is followed by rate equations which rely on lowest order αsgg = qq processes. Expansion slows down the quark cooking. Compared with the standard local equilibrium estimates we find a drastic reduction of mediumenergy photons if the initial quark admixure is below 20% of the chemical saturation density. Higher initial temperatures increase significantly the high-energy photon yield and overcompensate this reduction.

  • Open Access Logo Forschungszentrum Rossendorf; FZR 93-09 Preprint
    ISSN: 1436-3976
  • Jadernaja fizika 58, (1995), 2260-2265
  • Phys. Atom. Nucl. 58, (1995), 2144-2149

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Permalink: https://www.hzdr.de/publications/Publ-25


Untersuchungen zu natürlich-radioaktiven Inhaltsstoffen in Berghalden des Wismutbergbaus in Schlema

Geipel, G.; Thieme, M.; Bernhard, G.; Baraniak, L.

  • Lecture (Conference)
    Hauptversammlung der GDCh Hamburg

Permalink: https://www.hzdr.de/publications/Publ-24


In-situ-Charakterisierung von Retentionsprozessen an Gesteinen mittels SWV

Thieme, M.

  • Poster
    ELACH 1, Elektroanalyt. Tagung, Feldberg, 2.-4.6.1993

Permalink: https://www.hzdr.de/publications/Publ-23


Untersuchungen zur Geschwindigkeit der Retention umweltrelevanter Schwermetallspezis an Halden- und Modellgesteinen

Thieme, M.; Geipel, G.

  • Poster
    XLIV. Berg- u. Hüttenmännischer Tag, Freiberg, 16.-19.6.1993

Permalink: https://www.hzdr.de/publications/Publ-22


Investigation of two-phase flow phenomena at integral test facilities using needle conductivity probes

Maroti, L.; Prasser, H.-M.; Windberg, P.

Abstract

The paper deals with the utilization of needle shaped conductivity probes developed in Rossendorf during a small break LOCA experiment at the Budapest PMK test facility. A 1-%-break at the down-comer inlet was simulated, the ECC tanks were switched off. The probes worked properly under primary circuit conditions (12.3 MPa, 300 °C), the data acquision system provided clearly readable data in spite of the high electrical disturbance level caused by the directly heated fuel rod simulators of PMK. The paper presents plots of the signals of the probes. The level drop in the upper plenum of the reactor, the hot leg loop-seal clearing and the emptying of the steam generator cold collector were indicated. Closely after the loop-seal clearing void fraction oscillations with a period of about 22-24 sec were observed at the reactor outlet and the steam generator inlet.

  • Lecture (Conference)
    8th International Conference on Thermal Engineering and Thermogrammetry, Budapest, 2.-4.6.1993
  • Contribution to proceedings
    8th International Conference on Thermal Engineering and Thermogrammetry, Budapest, 2.-4.6.1993, p. 275 - 280

Permalink: https://www.hzdr.de/publications/Publ-21


High-resolution spectroscopy of fission fragments, neutrons and gamma-rays

Märten, H.; Schilling, K.-D.

  • Contribution to proceedings
    Proceedings of the International Workshop
  • Open Access Logo Forschungszentrum Rossendorf; FZR 93-08, 1993
    ISSN: 1436-3976

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Kinetics of an expanding pion gas and low-mass dilepton emission

Kämpfer, B.; Koch, P.; Pavlenko, O. P.

  • Physical Review C 49 (1994) pp. 3468
    DOI: 10.1103/PhysRevC.49.1132
    Cited 20 times in Scopus
  • Contribution to proceedings
    Int. Workshop on Nuclei + Nuclear Excitations, Hirschegg 1993, vom 3.11.93
  • Open Access Logo Forschungszentrum Rossendorf; FZR 93-07 Preprint
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-19


Technetium and rhenium complexes of mercapto-containing peptides - 1. Tc(V) and Re(V) complexes with mercaptoacetyl diglycine (MAG2) and X-ray structure of AsPh4[TcO(MAG2)] x C2H5OH

Johannsen, B.; Noll, B.; Noll, S.; Spies, H.; Leibnitz, P.; Reck, G.

Permalink: https://www.hzdr.de/publications/Publ-18


Tiefenlagenabhängigkeit von Struktur und Gefüge sowie der mechanischen Eigenschaften bei Reaktordruckbehälterstählen

Große, M.; Böhmert, J.; Viehrig, H.-W.

  • Poster
    Tagung "Gefüge und Bruch", Bochum, 17.-19.3.1993

Permalink: https://www.hzdr.de/publications/Publ-17


Institute of Ion Beam Physics and Materials Research; Annual Report 1992

Matz, W.; Prokert, F.

  • Open Access Logo Forschungszentrum Rossendorf; FZR 93-06
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-16


Radonexhalation aus Bergbauhinterlassenschaften im Döhlener Becken

Baraniak, L.; Mende, A.

  • Poster
    XLIV. Berg- u. Hüttenmännischen Tag, Freiberg, Juni 1993

Permalink: https://www.hzdr.de/publications/Publ-14


Nutzung einer zukünftigen Synchrotronstrahlungsquelle, Arbeitstreffen am 15. und 16. Dezember 1992 in Dresden, Sammlung der Beiträge

Matz, W.

  • Open Access Logo Forschungszentrum Rossendorf; FZR 93-03
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-13


Betriebsergebnisse und Untersuchungen zur Stillegung der Anlage zur Molybdän-99-produktion Rossendorf -AMOR-I-

Bernhard, G.

  • Open Access Logo Forschungszentrum Rossendorf; FZR 93-04
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-12


The Code DYN3D/M2 for the Calculation of Reactivity Initiated Transients in Light Water Reactors with Hexagonal Fuel Elements -Code Manual and Input Data Description-

Grundmann, U.; Rohde, U.

Abstract

The code DYN3D/M2 is used for investigations of reactivity transients in cores of thermal power reactors with hexagonal fuel elements. The 3-dimensional neutron kinetics model HEXDYN3D of the code is based on a nodal expansion method for solving the two-group neutron diffusion equation. The thermo-hydraulic part FLOCAL consists of a two-phase flow model describing coolant behaviour and a fuel rod model. The fuel elements are simulated by separate coolant channels. Additional, some hot channels with power peaking factors belonging to chosen fuel elements can be considered. Several safety parameters as temperatures, DNBR and fuel enthalpy are evaluated. Macroscopic cross sections depending from the thermo-hydraulic parameters and boron concentration are input data of the code. The stationary state and transient behaviour can be analyzed. The arrangement of input data are descibed for using the different option of the code.

  • Open Access Logo Forschungszentrum Rossendorf; FZR 93-02 Reprint of Report FSS-2/92, February 1992
    ISSN: 1436-3976

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DYN3D/M2 - a Code for Calculation of Reactivity Transients in Cores with Hexagonal Geometry

Grundmann, U.; Rohde, U.

Abstract

The code DYN3D/M2 consists of a the 3-dimensional neutron kinetic model of the code HEXDYN3D and the thermohydraulic model of the code FLOCAL. The neutron kinetics of DYN3D/M2 is calculated by using a nodal expansion method (NEM) for hexagonal geometry. The developed method solves the neutron diffusion equation for two energy groups. Stationary state and transient behaviour can be calculated. By help of the code PREPAR-EC parameterizid neutron physical constants of given burnup distribution can be transferred from the MAGRU library to an input file of DYN3D/M2. The code FLOCAL consisting of a two-phase coolant flow model, a fuel rod model and a heat transfer regime map up to superheated steam is coupled with neutron kinetics by the neutron physical constants. One coolant channel per fuel assembly and additional hot channels are considered. The activities for code validation and the range of application are described.

  • Open Access Logo Forschungszentrum Rossendorf; FZR 93-01 Reprint of Report ZfK-690, November 1989
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-10


Projektvorbereitung und -abwicklung des Bund-Länder-1000-Dächer-Photovoltaik-Programms

Rindelhardt, U.; Teichmann, G.

Abstract

The report summarizes the present state of the 1000-Roof-Photovoltaic-Programme (sponsered by the BMFT and the Federal States) in the five new German Federal states. After some starting problems the programme is well accepted also in East Germany now, especially in Brandenburg, Saxony and Thuringia. Statistical data are given on the siutation in the single states.
Some operation results are discussed in more detail. A final yield of 2 kWh/kWp.a seems to be possible, at least in the region of Saxony. The share of the direct used solar energy by the plant owner strongly depends on the individual energy consumption and on the season. During the winter only a share of 10 % is realistic, but in summer the value can reach 50 % or more. The average performance ratio of several systems is estimated to 68 %.

  • Lecture (Conference)
    BMFT-Statusbericht Photovoltaik / BMFT-Statusseminar 27.-29.4.1993 in Bad Breisig, Tagungsband S.66
  • Contribution to proceedings
    BMFT-Statusbericht Photovoltaik / BMFT-Statusseminar 27.-29.4.1993 in Bad Breisig, Tagungsband S.66

Permalink: https://www.hzdr.de/publications/Publ-9


The solid electrolyte technique as a precise method for the investigation of reduction - oxidation - reactions

Nebelung, C.

  • Poster
    12th International Symposium on Microchemical Techniques 06.09.1992, Cordoba, Spain

Permalink: https://www.hzdr.de/publications/Publ-8


1000-Dächer-Programm in Sachsen und Thüringen: Programmablauf, Anlagentechnik und Ergebnisse

Eckert, W.; Knopf, U.; Rindelhardt, U.; Teichmann, G.

Abstract

The paper dealt with the first results of the 1000-Roof-Photovoltaic Programme in the German Federal States of Saxony and Thuringia. Experiences in designing and mounting the pv-plants are discussed. Up to the end of 1992 totally 70 small pv-plants were coupled to the grid in both states. From the first results a mean energy production of about 700 kWh per installed power of 1 kWp can be extrapolated. The most technical difficulties resulted from the used DC-AC-inverters. Additional problems were caused by the grid itself, which was still integrated in the East European Network.

  • Lecture (Conference)
    8. Nationales Symposium "Photovoltaische Solarenergie", Staffelstein, 17.-19. März 1993, Tagungsband S. 125
  • Contribution to proceedings
    8. Nationales Symposium "Photovoltaische Solarenergie", Staffelstein, 17.-19. März 1993, Tagungsband S. 125

Permalink: https://www.hzdr.de/publications/Publ-7


Technetium Complexes with Thioether Ligands - III. Synthesis and Structural Characterization of Cationic Nitridotechnetium(V) Complexes with Thiacrown ethers

Pietzsch, H.-J.; Spies, H.; Leibnitz, P.; Reck, G.

  • Polyhedron 12 (1993) 24 pp. 2995-3002

Permalink: https://www.hzdr.de/publications/Publ-6


Warmwasserbereitung mit thermischen Solaranlagen - Eine Einführung in Technik und Kosten

Maletti, R.

  • Contribution to external collection
    Sächsisches Staatsministerium für Wirtschaft und Arbeit, Dezember 1993, Januar 1996

Permalink: https://www.hzdr.de/publications/Publ-5


Netzgekoppelte Photovoltaikanlagen: Stand und aktuelle Ergebnisse

Rindelhardt, U.

Abstract

Der derzeitige Entwicklungsstand bei netzgekoppelten Photovoltaikanlagen wird dargestellt. Basierend auf einer Darstellung der eingesetzten Anlagentechnik und ihrer Besonderheiten werden aktuelle Betriebsergebnisse von kleinen (1 bis 5 kWp) Anlagen diskutiert. Die Ergebnisse wurden vorwiegend an Anlagen gewonnen, die im Rahmen des 100-Dächer-Programms in Sachsen errichtet wurden. Abschließend wird auf künftige Entwicklungen eingegangen.

  • Energieanwendung und Energietechnik Heft 6, 1993, S. 300

Permalink: https://www.hzdr.de/publications/Publ-4


Narrow Emission from a Lithium Liquid Metal lon Source

Hesse, E.; Naehring, F.

Abstract

At a lithium metal ion source two concentric emission bundles with sharp outlines are observed, which may indicate two different kinds of emitted ions and/or emission mechanisms. The angular intensity of the narrow bundle is the highest yet reported for liquid metal ion source.

Permalink: https://www.hzdr.de/publications/Publ-2


Selforganization in the nuclear system: I. The slaving principle

Iskra, W.; Müller, M.; Rotter, I.

  • Journal of Physics G 19 (1993), 2045-2062
  • Open Access Logo Forschungszentrum Rossendorf; FZR 93-01 Preprint 1993
    ISSN: 1436-3976

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Permalink: https://www.hzdr.de/publications/Publ-1


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