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

[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.

[发布日期] 2000-09-28 [发布机构] Lawrence Livermore National Laboratory

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