EVALUATION OF NEUTRON CROSS SECTIONS FOR A COMPLETE SET OF Nd ISOTOPES.

KIM,H. ; HERMAN, M. ; MUGHABGHAB, S.F. ; OBLOZINSKY, P. ; ROCHMAN, D. ; Y.-O., LEE.

Brookhaven National Laboratory

关键词: Nuclear Data Collections;    Nuclear Reactions;    Energy Range;    Fast Neutrons;    Neutron Transport;   

DOI  :  10.2172/921937
RP-ID  :  BNL--79662-2007-IR
RP-ID  :  DE-AC02-98CH10886
RP-ID  :  921937

美国|英语

来源: UNT Digital Library

【 摘 要 】

Neutron cross sections for a complete set of Nd isotopes, {sup 142,143,144,145,146,147,148,150}Nd, were evaluated in the incident energy range from 10{sup -5} eV to 20 MeV. In the low energy region, including thermal and resolved resonances, our evaluations are based on the latest data published in the Atlas of Neutron Resonances. In the unresolved resonance region we performed additional evaluation by using the averages of the resolved resonances and adjusting them to the experimental data. In the fast neutron region, we used the nuclear reaction model code EMPIRE-2.19 validated against the experimental data. The results are compared to the existing nuclear data libraries, including ENDF/B-VI.8, JENDL-3.3 and JEFF-3.1, and to the available experimental data. The new evaluations are suitable for neutron transport calculations and they were adopted by the new evaluated nuclear data file of the United States, ENDF/B-VII.0, released in December 2006.