R-matrix analysis of the light element standards
Conference
·
· Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States)
OSTI ID:7365015
The application of multilevel, multichannel R-matrix theory to the analysis of reactions in light nuclear systems is outlined. The discussion then specializes to describe analyses of reactions in the /sup 7/Li and /sup 11/B systems, which contain (n,..cap alpha..) cross sections widely used as neutron standards. Comprehensive R-matrix analyses which were incorporated in Version IV of the Evaluated Nuclear Data File (ENDF/B-IV) for neutron reactions from /sup 6/Li and /sup 10/B are described, giving the reactions and data analyzed, the resulting parameters, and predicted cross sections. The effects of new experimental information on the ENDF/B-IV results are discussed for both lithium and boron. Particular attention is given to the perplexing question of determining the /sup 6/Li(n,..cap alpha..) cross section in the region of the 240 keV resonance. Suggestions for further experimental work are given. 11 figures. (auth)
- Research Organization:
- Los Alamos Scientific Lab., NM
- OSTI ID:
- 7365015
- Conference Information:
- Journal Name: Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States) Journal Volume: 1
- Country of Publication:
- United States
- Language:
- English
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