Calculation of 239Pu(n,2n) Cross Section by the Subtraction and the Ratio Methods

Mavratil, P. ; McNabb, D.P.

Lawrence Livermore National Laboratory

关键词: Cross Sections;    Nuclei;    71 Classical And Quantum Mechanics, General Physics;    Unitarity;   

DOI  :  10.2172/792742
RP-ID  :  UCRL-ID-140697
RP-ID  :  W-7405-Eng-48
RP-ID  :  792742

美国|英语

来源: UNT Digital Library

【 摘 要 】

The {sup 239}Pu(n,2n) and the {sup 235}U(n,2n) cross section are estimated by applying unitarity in several approaches: a subtraction method and also by using a ratio approach that relates the above cross sections to the {sup 238}U(n,2n) cross section and the {sup 239}Pu(n,2n) cross section to the {sup 235}U(n,2n) cross section, respectively. Also, a self-consistent, simultaneous analysis of the cross section data of four nuclei, {sup 239}Pu, {sup 235}U, {sup 238}U and {sup 232}Th, was undertaken to evaluate the {sup 239}Pu(n,2n) cross section at 11 MeV.