MODELING AND FISSION CROSS SECTIONS FOR AMERICIUM.

ROCHMAN, D. ; HERMAN, M. ; OBLOZINSKY, P.

Brookhaven National Laboratory

关键词: Americium Isotopes;    Fission;    Lanl;    Simulation;    Nuclear Reactions;   

DOI  :  10.2172/15016375
RP-ID  :  BNL--74667-2005
RP-ID  :  AC02-98CH10886
RP-ID  :  15016375

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来源: UNT Digital Library

【 摘 要 】

This is the final report of the work performed under the LANL contract on the modeling and fission cross section for americium isotopes (May 2004-June 2005). The purpose of the contract was to provide fission cross sections for americium isotopes with the nuclear reaction model code EMPIRE 2.19. The following work was performed: (1) Fission calculations capability suitable for americium was implemented to the EMPIRE-2.19 code. (2) Calculations of neutron-induced fission cross sections for {sup 239}Am to {sup 244g}Am were performed with EMPIRE-2.19 for energies up to 20 MeV. For the neutron-induced reaction of {sup 240}Am, fission cross sections were predicted and uncertainties were assessed. (3) Set of fission barrier heights for each americium isotopes was chosen so that the new calculations fit the experimental data and follow the systematics found in the literature.