Neutron capture and neutron-induced fission experiments on americium isotopes with DANCE

Journal Article · Wed Jan 28 04:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3087017· OSTI ID:21255412

Jandel, M; Bredeweg, T A; Fowler, M M; Bond, E M; Couture, A; Haight, R C; Keksis, A L; O'Donnell, J M; Rundberg, R S; Ullmann, J L; Vieira, D J; Wilhelmy, J B; Wouters, J M ^[1]; Stoyer, M A; Wu, C Y; Becker, J A; Haslett, R J; Henderson, R A ^[2]

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1. Los Alamos National Laboratory, Los Alamos, NM, 87545 (United States)
2. Lawrence Livermore National Laboratory, Livermore, CA, 94550 (United States)

Neutron capture cross section data on Am isotopes were measured using the Detector for Advanced Neutron Capture Experiments (DANCE) at Los Alamos National Laboratory. The neutron capture cross section was determined for {sup 241}Am for neutron energies between thermal and 320 keV. Preliminary results were also obtained for {sup 243}Am for neutron energies between 10 eV and 250 keV. The results on concurrent neutron-induced fission and neutron-capture measurements on {sup 242m}Am will be presented where the fission events were actively triggered during the experiments. In these experiments, a Parallel-Plate Avalanche Counter (PPAC) detector that surrounds the target located in the center of the DANCE array was used as a fission-tagging detector to separate (n,{gamma}) events from (n,f) events. The first direct observation of neutron capture on {sup 242m}Am in the resonance region in between 2 and 9 eV of the neutron energy was obtained.

• OSTI ID: 21255412
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1090; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMERICIUM 241
AMERICIUM 242
AMERICIUM 243
CAPTURE
CROSS SECTIONS
EV RANGE
FISSION
KEV RANGE
NEUTRON REACTIONS
NEUTRONS
NUCLEOSYNTHESIS
RESONANCE