R-Matrix Evaluation of Cl Neutron Cross Sections up to 1.2 MeV

Sayer, R.O.

Oak Ridge National Laboratory

关键词: Criticality;    Charged Particles;    Modifications;    Neutrons;    Cross Sections;   

DOI  :  10.2172/814066
RP-ID  :  ORNL/TM-2003/50
RP-ID  :  AC05-00OR22725
RP-ID  :  814066

美国|英语

来源: UNT Digital Library

【 摘 要 】

We have performed an evaluation of {sup 35}Cl, {sup 37}Cl, and {sup nat}Cl neutron cross sections in the resolved resonance region with the multilevel Reich-Moore R-matrix formalism. Resonance analyses were carried out with the computer code SAMMY, which utilizes Bayes' method, a generalized least squares technique. A recent modification of SAMMY enabled us to calculate charged particle penetrabilities for the proton exit channel. Our resonance parameter representation describes the data much better than does ENDF/B-VI, and it should lead to improved criticality safety calculations for systems where Cl is present.