Multiplicity Counting

Geist, William H.¹ 

[1] Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

关键词: FISSION NEUTRONS;    MULTIPLICITY;    PLUTONIUM 240;    NEUTRON DETECTORS;    SPONTANEOUS FISSION;    COINCIDENCE METHODS;    DISTRIBUTION;    CORRECTIONS;    NEUTRON LEAKAGE;    MASS;    MATHEMATICAL MODELS;    ALPHA REACTIONS;    COMPOUND-NUCLEUS REACTIONS;    DEAD TIME;    NEUTRONS;    NEUTRON DETECTION;   

DOI  :  10.2172/1227250
RP-ID  :  LA-UR--15-29203
PID  :  OSTI ID: 1227250
Others  :  TRN: US1600089

美国|英语

来源: SciTech Connect

【 摘 要 】

This set of slides begins by giving background and a review of neutron counting; three attributes of a verification item are discussed: ²⁴⁰Pu_eff mass; ??, the ratio of (??,n) neutrons to spontaneous fission neutrons; and leakage multiplication. It then takes up neutron detector systems ??? theory & concepts (coincidence counting, moderation, die-away time); detector systems ??? some important details (deadtime, corrections); introduction to multiplicity counting; multiplicity electronics and example distributions; singles, doubles, and triples from measured multiplicity distributions; and the point model: multiplicity mathematics.