Open Access

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2016-06-24
13:41
OpenAccess [FZJ-2016-03385] Journal Article
; ; ; et al
Spin-wave and electromagnon dispersions in multiferroic MnWO 4 as observed by neutron spectroscopy: Isotropic Heisenberg exchange versus anisotropic Dzyaloshinskii-Moriya interaction
High-resolution inelastic neutron scattering reveals that the elementary magnetic excitations in multiferroic MnWO4 consist of low-energy dispersive electromagnons in addition to the well-known spin-wave excitations. The latter can well be modeled by a Heisenberg Hamiltonian with magnetic exchange coupling extending to the 12th nearest neighbor. [...]
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2016-06-24
11:32
OpenAccess [FZJ-2016-03383] Report

Messung der Adsorptionsisothermen von Cäsium auf Wandmaterialien des Hochtemperaturreaktors
[Juel-1332]
Berichte der Kernforschungsanlage Jülich 1332, 83 p. (1976)
Es wurde gezeigt, daß die Methode der Austrittsarbeitsmessung bei der Untersuchung der Spaltproduktadsorption wichtige Vorteilebesitzt: Sie ermöglicht durch ihre extrem geringe Informationstiefe von einer atomaren Schicht die Messung von Adsorbatkonzentrationen unabhängig von Volumenkonzentrationen und erlaubt zudem Messungen im Gleichgewicht mit der Gasphasedes Adsorbates, also bei definiertem chemischen Potential. Insbesondere das Schwingkondensatorverfahren gestattet die Messung der Austrittsarbeit und damit von Adsorbatkonzentrationen zerstörungs frei und äußerst empfindlich (typische Auflösung bei Cäsium: 0.001 Monolagen) im interessanten Bereich unterhalb einer Monolage [...]
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2016-06-24
11:16
OpenAccess [FZJ-2016-03382] Report
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ANIGAM: ein Programmsystem zur automatischen Berechnung nuklearer Gruppendaten
[Juel-1327]
Berichte der Kernforschungsanlage Jülich 1327, 27, [40] p. (1976)
The computer code ANIGAm consists mainly of the well-known programmes GAMl and ANISN as weil as of a subroutine which reads the THERMOS cross section library and prepares it for ANISN. ANIGAM has been written for the automatic caiculation of microscopic and macroscopic cross sections of light water reactor fuel assemblies. [...]
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2016-06-24
11:00
OpenAccess [FZJ-2016-03381] Report

Stratospheric Ozone Depletion: Analysis of Heterogeneous Chemistry in the Antarctic
[Juel-4394]
Berichte des Forschungszentrums Jülich 4394, 70 pp., (2016)
In spite of the success of the Montreal protocol and its amendments and adjustmentsin reducing the stratospheric chlorine loading, due to the long atmospheric lifetimeof chlorine source gases, the Antarctic ozone hole will continue to occur for decades(WMO, 2014). The ozone hole arises from ozone destruction driven by elevated levelsof ozone destroying (“active”) chlorine in Antarctic spring [...]
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2016-06-24
10:44
OpenAccess [FZJ-2016-03380] Report

Das Transportverhalten der Spaltprodukte Cäsium und Strontium in beschichteten Brennstoffteilchen für Hochtemperatur-Reaktoren unter Bestrahlungsbedingungen
[Juel-1324]
Berichte der Kernforschungsanlage Jülich 1324, III, 114 p. (1976)
At first a survey is given about existing knowledge of the behaviour of caesium and strontium fission product transport in coated particles. In order to descripe the complicated fission product transport mechanisms under irradiation conditions a suitable calculating model (SLIPPER) is taken over and modified to the special problems of an irradiation experiment. [...]
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2016-06-24
10:36
OpenAccess [FZJ-2016-03379] Report

Anwendung von Zwei-Phasen-Diffusion zur Beschreibung der Freisetzung von Cäsium aus kugelförmigen HTR-Brennelementen
[Juel-1323]
Berichte der Kernforschungsanlage Jülich 1323, 74 p. (1976)
For the theoretical prediction of fission product release from HTR-fuel elements the one-dimensional diffusion code SLIPPER has been developed, which describes the transport of fission products optionally by one- or two-phase diffusion. The mathematical-physical basis and general program-technical aspects are presented. [...]
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2016-06-24
10:20
OpenAccess [FZJ-2016-03378] Journal Article
; ; ; et al
Exchange interactions of magnetic surfaces below two-dimensional materials
In this theoretical investigation we demonstrate that the adsorption of spatially extended two-dimensional (2D) π systems such as graphene and hexagonal boron nitride on the ferromagnetic fcc Co(111) surface leads to a specific behavior of the in-plane and interlayer Co-Co magnetic exchange interactions. More specifically, for both systems the magnetic exchange coupling within the first Co layer is enhanced, while the one between the first and the second Co layer is not modified, in contrast to the magnetic interlayer softening induced by organic molecules. [...]
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2016-06-24
10:02
OpenAccess [FZJ-2016-03375] Report
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Kosten des Verbrennungs-HEAD END's einschließlich der Kr-Abtrennungbei der Wiederaufarbeitung von HTR-Brennelementen
[Juel-1320]
Berichte der Kernforschungsanlage Jülich 1320, 57 p. (1976)
Es werden die C-Verbrennung und die Kr-Abtrennung während des Verbrennungs-HEAD ENDs der Wiederaufarbeitung von HTR-Brennelementen beschrieben. Die Kosten für Bau und Betrieb eines Verbrennungs-HEAD ENDs der Wiederaufarbeitungskapazitäten von 5000 bis 50000 MWe-HTR-Leistung wurden ermittelt. [...]
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2016-06-24
09:34
OpenAccess [FZJ-2016-03366] Report
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Abscheidung von Pyrokohlenstoff aus C$_{2}$H$_{2}$-C$_{3}$H$_{6}$-Ar-Gasgemischen - Beschichtung unter adiabatischen Bedingungen -
[Juel-1317]
Berichte der Kernforschungsanlage Jülich 1317, 38 p. (1976)
This study describes the deposition of pyrocarbon in a 55 nundiameter fluidizedbed reactor without heatexchange from a mixture of ethyne propene and argon gas based on thermodynamical calculations..
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2016-06-24
09:22
OpenAccess [FZJ-2016-03360] Report

Beiträge zur Chemie, Physik und Technologie des elementaren Kohlenstoffes in verschiedenen Erscheinungsformen für die CARBON '76: Internationale Kohlenstoff Tagung in Baden-Baden vom 28. Juni bis 2. Juli 1976
[Juel-1316]
Berichte der Kernforschungsanlage Jülich 1316, 59 p. (1976)
This report is the compilation of a number of papers prepared by KFA Jülich for the 2nd International Carbon Conference CARBON '76 at Baden-Baden, June 28th - July 2nd, 1976. The presentations deal with objectives of chemistry, physics and technology of the elementary carbon in various states including irradiation induced effects on graphite and pyrolytic carbon. [...]
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