Resonant rate for {sup 15}{ital O}({alpha},{gamma}){sup 19}Ne
Journal Article
·
· Physical Review Letters
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
We have measured angular distributions for the {sup 15}N({sup 6}Li,{ital d}){sup 19}F and {sup 16}O({sup 6}Li,{ital d}){sup 20}Ne reactions at a bombarding energy of 22 MeV. Distorted-wave Born-approximation and Hauser-Feshbach calculations were used to analyze the data. Ratios of {alpha}-transfer cross sections in {sup 19}F and {sup 20}Ne, plus isospin invariance, provide ratios of {alpha} widths in {sup 19}Ne and {sup 20}Ne. Using {sup 20}Ne (1{sup {minus}}, 5.788 MeV) as a standard allows the determination of the {alpha}-particle width for the state at 4.033 MeV in {sup 19}Ne, and hence the resonant rate for the {sup 15}O({alpha},{gamma}){sup 19}Ne reaction, contributed from the 504 keV, 3/2{sup +} resonance, at temperatures of astrophysical interest.
- OSTI ID:
- 55267
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 74; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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