Review of Livermore-Led Neutron Capture Studies Using DANCE
We have made neutron capture cross-section measurements using the white neutron source at the Los Alamos Science Center, the DANCE detector array (Detector for Advanced Neutron Capture Experiments) and targets important for basic science and stockpile stewardship. In this paper, we review results from (n,{gamma}) reactions on {sup 94,95}Mo, {sup 152,154,157,160,nat}Gd, {sup 151,153}Eu and {sup 242m}Am for neutron energies from < 1eV up to {approx} 20 keV. We measured details of the {gamma}-ray cascade following neutron capture, for comparison with results of statistical model simulations. We determined the neutron energy dependent (n,{gamma}) cross section and gained information about statistical decay properties, including the nuclear level density and the photon strength function. Because of the high granularity of the detector array, it is possible to look at gamma cascades with a specified number of transitions (a specific multiplicity). We simulated {gamma}-ray cascades using a combination of the DICEBOX/GEANT computer codes. In the case of the deformed nuclei, we found evidence of a scissors-mode resonance. For the Eu, we also determined the (n,{gamma}) cross sections. For the {sup 94,95}Mo, we focused on the spin and parity assignments of the resonances and the determination of the photon strength functions for the compound nuclei {sup 95,96}Mo. Future plans include measurements on actinide targets; our immediate interest is in {sup 242m}Am.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 914617
- Report Number(s):
- UCRL-CONF-231210
- Country of Publication:
- United States
- Language:
- English
Similar Records
Progress on the Europium Neutron-Capture Study using DANCE
Neutron capture and neutron-induced fission experiments on americium isotopes with DANCE
Neutron capture and neutron-induced fission experiments on americium isotopes with DANCE
Conference
·
Tue Sep 05 00:00:00 EDT 2006
·
OSTI ID:900869
Neutron capture and neutron-induced fission experiments on americium isotopes with DANCE
Conference
·
Mon Dec 31 23:00:00 EST 2007
·
OSTI ID:960706
Neutron capture and neutron-induced fission experiments on americium isotopes with DANCE
Journal Article
·
Tue Jan 27 23:00:00 EST 2009
· AIP Conference Proceedings
·
OSTI ID:21255412