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

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

关键词: APPROXIMATIONS;    CAPTURE;    CHROMIUM 52;    CROSS SECTIONS;    ELASTIC SCATTERING;    KERNELS;    IRON 56;    NEUTRON REACTIONS;    NICKEL 58;    NEUTRONS;    RESONANCE national nuclear data ce;   

DOI  :  10.2172/1013500
RP-ID  :  BNL--93903-2010
PID  :  OSTI ID: 1013500
Others  :  R&D Project: EST-003-NEFA
Others  :  Other: KB0301041
Others  :  TRN: US1102672

美国|英语

来源: SciTech Connect

【 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.