Neutron Resonance Parameters and Covariance Matrix of 239Pu

Derrien, Herve¹  Leal, Luiz C¹  Larson, Nancy M¹ 

[1] ORNL

关键词: CROSS SECTIONS;    ENERGY RANGE;    FISSION;    NEUTRONS;    PROCESSING;    RESONANCE Neutron;    resonance;    covariance matrix;   

DOI  :  10.2172/969958
RP-ID  :  ORNL/TM-2008/123
PID  :  OSTI ID: 969958
Others  :  Other: DP0902090
Others  :  DPDP097
Others  :  TRN: US1000777

学科分类：物理（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

In order to obtain the resonance parameters in a single energy range and the corresponding covariance matrix, a reevaluation of 239Pu was performed with the code SAMMY. The most recent experimental data were analyzed or reanalyzed in the energy range thermal to 2.5 keV. The normalization of the fission cross section data was reconsidered by taking into account the most recent measurements of Weston et al. and Wagemans et al. A full resonance parameter covariance matrix was generated. The method used to obtain realistic uncertainties on the average cross section calculated by SAMMY or other processing codes was examined.