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Title: Energy dependent bias in plutonium verification measurements using thermal neutron multiplicity counters

Conference ·
OSTI ID:538022

Multiplicity analysis algorithms are extended to include the effect of ({alpha}, n) neutron energies on the detector efficiencies, induced fission probabilities, and induced fission factorial moments. The analysis is restricted to plutonium oxide. Bias is calculated as a function of ({alpha}, n) neutron energy for six thermal neutron coincidence counters: HLNC, AWCC, 3RMC, PSMC, PYRO, and 5RMC. Ring ratio data for the 3RMC are used to reduce energy dependent bias in the verification of impure plutonium oxide. The utility of the AWCC as a multiplicity counter is considered.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE, Washington, DC (United States)
DOE Contract Number:
W-7405-ENG-36
OSTI ID:
538022
Report Number(s):
LA-UR-97-3427; CONF-971031-; ON: DE98000279; TRN: 98:000093
Resource Relation:
Conference: International Atomic Energy Agency symposium on international safeguards, Vienna (Austria), 13-17 Oct 1997; Other Information: PBD: 1997
Country of Publication:
United States
Language:
English