Neutron Spectra, Fluence and Dose Rates from Bare and Moderated Cf-252 Sources

Radev, Radoslav P.¹ 

[1] Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

关键词: CALIFORNIUM 252;    NEUTRONS;    NEUTRON SPECTRA;    DOSE RATES;    SPONTANEOUS FISSION;    CALIBRATION;    MODERATORS;    ORIGIN;    POSITIONING;    NEUTRON FLUENCE;    RADIOISOTOPE NEUTRON SOURCES;   

DOI  :  10.2172/1252630
RP-ID  :  LLNL-TR--688699
PID  :  OSTI ID: 1252630
Others  :  TRN: US1601365

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

A new, stronger ²⁵²Cf source (serial number SR-CF-3050-OR) was obtained from Oak Ridge National Laboratory (ORNL) in 2014 to supplement the existing ²⁵²Cf sources which had significantly decayed. A new instrument positioning track system was designed and installed by Hopewell Designs, Inc. in 2011. The neutron field from the new, stronger ²⁵²Cf source in the modified calibration environment needed to be characterized as well as the modified neutron fields produced by the new source and seven different neutron moderators. Comprehensive information about our ²⁵²Cf source, its origin, production, and isotopic content and decay characteristics needed to be compiled as well. This technical report is intended to address these issues.