Prompt and Delayed Inelastic Scattering Reactions from Fission Neutron PGAA - First Results of FaNGaS

Conference · Wed Jul 01 00:00:00 EDT 2015

OSTI ID:22531244

Rossbach, M.; Randriamalala, T. ^[1]; Revay, Zs.; Kudejova, P.; Soelradel, S.; Wagner, F. ^[2]

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1. Institute of Energy and Climate Research, IEK-6: Nuclear Waste Management and Reactor Safety, Forschungszentrum Juelich GmbH, 52425 Juelich (Germany)
2. Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universitaet Muenchen, Lichtenbergstr. 1, 85748 Garching (Germany)

The new instrument Fast Neutron Gamma Spectroscopy (FaNGaS) has been installed at the SR10 beam line of the FRM II Research Reactor in Garching and tested successfully. Complimentary to cold neutron PGAA, with FaNGaS inelastic scattering reactions induced by fission neutrons can be studied. Gamma lines from (n,n'γ) reactions up to now have been rarely studied and no adequate compilation of the emitted gamma energies exist. In developing nondestructive analytical techniques using neutron generator based PGAA such data are badly needed for quantification of heavy metals and actinides in e.g. nuclear waste or safeguards samples. A number of elements and relevant actinides have been irradiated in the fast neutron beam SR10 at the FRM II reactor in Garching, Germany. A heavily shielded 50% eff. HPGe detector perpendicular to the beam is looking at the samples exposed to 2.3 E8 cm{sup -2}s{sup -1} fission neutrons. Prompt gamma spectra have been taken and evaluated using the available data in scattered sources. Additional gamma lines have been detected and are being compiled to create a data base for (n,n') reactions. Particular emphasis is given on actinides including {sup 238}U, {sup 232}Th, {sup 237}Np, {sup 242}Pu and {sup 241}Am. Some examples will be given and first results will be discussed in this contribution. (authors)

• Research Organization: Institute of Electrical and Electronics Engineers - IEEE, 3 Park Avenue, 17th Floor, New York, N.Y. 10016-5997 (United States)
• OSTI ID: 22531244
• Report Number(s): ANIMMA-2015-IO-190; TRN: US16V0510102185
• Resource Relation: Conference: ANIMMA 2015: 4. International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications, Lisboa (Portugal), 20-24 Apr 2015; Other Information: Country of input: France
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
AMERICIUM 241
COLD NEUTRONS
FAST NEUTRONS
FISSION NEUTRONS
FRM-II REACTOR
GAMMA SPECTRA
GAMMA SPECTROSCOPY
HIGH-PURITY GE DETECTORS
INELASTIC SCATTERING
IRRADIATION
NEPTUNIUM 237
NEUTRON GENERATORS
PLUTONIUM 242
RADIOACTIVE WASTES
THORIUM 232
URANIUM 238