Neutron cross section covariances in the resonance region: 52Cr, 56Fe, 58Ni

Oblozinsky, P. ; Cho, Y.-S. ; Mattoon, C.M. ; Mughabghab, S.F.

National Nuclear Data Center

关键词: Iron 56;    Nickel 58;    Elastic Scattering;    Approximations;    Capture;   

DOI  :  10.2172/1013500
RP-ID  :  BNL--93903-2010
RP-ID  :  DE-AC02-98CH10886
RP-ID  :  1013500

美国|英语

来源: UNT Digital Library

【 摘 要 】

We evaluated covariances for neutron capture and elastic scattering cross sections on major structural materials, {sup 52}Cr, {sup 56}Fe and {sup 58}Ni, in the resonance region which extends beyond 800 keV for each of them. Use was made of the recently developed covariance formalism based on kernel approximation along with data in the Atlas of Neutron Resonances. The data of most interest for AFCI applications, elastic scattering cross section uncertainties at energies above about few hundred keV, are on the level of about 12% for {sup 52}Cr, 7-8% for {sup 56}Fe and 5-6% for {sup 58}Ni.