Summary of the work of the neandc task force on U-238

Abstract

A b s t r a c t The work of t h e NEANDC Task Force on U-238 i s reviewed and t h e p r o g r e s s made i n understanding t h e o r i g i n of t h e d i s c r e p a n c i e s i n t h e neutron widths of the r e s o l v e d resonances above 1.4 keV and t h e 'capture c r o s s -s e c t i o n between 1 and 30 keV i s d i s c u s s e d . The discrepancy i n n e u t r o n widths appears t o be due t o t h e r e s o l u t i o n f u n c t i o n of the experiments being wider and more complex than assumed. The c a p t u r e c r o s s -s e c t i o n problem may i n p a r t be due t o t h e i n c o r r e c t n o r m a l i s a t i o n of an experiment i n t h e keV energy range.