Mirror states in {sup 19}F and {sup 19}Ne and the astrophysical {sup 18}F(p,{gamma}){sup 19}Ne reaction rate
Journal Article
·
· Bulletin of the American Physical Society
OSTI ID:374998
- and others
Breakout from the extended HotCNO cycle may occur through the reaction sequence {sup 18}F(p,{gamma}){sup 19}Ne(p,{gamma}){sup 20}Na. At astrophysically interesting temperatures and densities the extent of breakout is determined by competition between {sup 18}F(p,{gamma}){sup 19}Ne and {sup 18}F(p,{alpha}){sup 15}O through resonances in the compound nucleus, {sup 19}Ne. The current knowledge of the partial gamma widths of the important resonances in these reactions comes from their mirror states in {sup 19}F. Though the mirror identifications for most of these resonances have been studied through the {sup 16}O({sup 6}Li,{sup 3}He){sup 19}F and {sup 16}O({sup 6}Li,t){sup 19}Ne reactions, they are not well known. To further investigate these mirror identifications the authors populated the relevant states by the direct reactions {sup 20}Ne(d,{sup 3}He){sup 19}F and {sup 20}Ne(d,t){sup 19}Ne at a beam energy of 30 MeV. Cross sections were measured between 12.5{degrees} and 40{degrees} in the lab, and a high resolution measurement was made at 20{degrees}. Resulting mirror identifications and astrophysical implications will be discussed.
- DOE Contract Number:
- FG02-91ER40609
- OSTI ID:
- 374998
- Report Number(s):
- CONF-9304297--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 2 Vol. 40; ISSN BAPSA6; ISSN 0003-0503
- Country of Publication:
- United States
- Language:
- English
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