Nuclear Data Matters - The obvious case of a bad mixing ratio for 58Co

Hoffman, R. D.¹  Nesaraja, Caroline D.²  Mattoon, Caleb¹ 

[1] Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States);Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

关键词: COBALT 58;    ISOMERIC NUCLEI;    MIXING RATIO;    CROSS SECTIONS;    BRANCHING RATIO;    NEUTRON REACTIONS;    PROTON REACTIONS;    GAMMA CASCADES;    KEV RANGE 10-100;    NUCLEAR MODELS;    NUCLEAR DATA COLLECTIONS;    GROUND STATES;    DATA COVARIANCES;   

DOI  :  10.2172/1184173
RP-ID  :  LLNL-TR--670936
PID  :  OSTI ID: 1184173
Others  :  TRN: US1500305

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

We present results of modeled cross sections for neutron- and proton-induced reactions leading to the final product nucleus ⁵⁸Co. In each case the gamma-cascade branching ratios given in the ENSDF database circa 2014 predict modeled nuclear cross sections leading to the ground and first excited metastable state that are incompatible with measured cross sections found in the NNDC experimental cross section database EXFOR. We show that exploring the uncertainty in the mixing ratio used to calculate the gamma-cascade branching ratios for the 53.15 keV 2^nd excited state leads to changes in the predicted partial cross sections by amounts that give good agreement with measured data.