Figaro facility at los alamos: capabilities and first results.

Haight, R. C. ; Devlin, M.

Technical Information Center Oak Ridge Tennessee

关键词: Neutron detectors;    Gamma rays;    Conversion electrons;    Lanl;    Nuclear facilities;   

RP-ID  :  DE2001785159

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

A new beam line at the fast neutron spallation source at Los Alamos Neutron Science Center has been constructed for studies of neutron-induced reactions producing gamma rays, internal conversion electrons or neutrons. This facility, called FIGARO (Fast neutron-induced Gamma-Ray Observer), follows on the great successes of GEANIE (described in other contributions to the Conference), by detecting de-excitation gamma rays with high-resolution germanium detectors. FIGARO has fewer gamma-ray detectors than GEANIE, but instead offers other features including: extremely good collimation of the neutron beam for background reduction, a flexible experimental area to optimize detection efficiency and to allow evaluation of other detectors such as ICEBALL-II for internal conversion electrons, inclusion of neutron detectors for the study of neutron-gamma coincidences, beam time to relieve the scheduling pressure on GEANIE, and a PC-based data acquisition system. Our initial measurements include level density studies through 59Co(n, x gamma) reactions to complement our previous 59Co(n, x alpha) measurements, reaction studies of MeV neutron on 99Tc with the goal of determining cross sections relevant to transmutation and neutron transport in the design of facilities to incinerate nuclear waste, and an assessment of measuring internal conversion electrons, rather than gamma rays, produced by neutron excitation of actinides.