Measurement of the {Gamma}{sub {gamma}}/{Gamma}{sub tot} of the E{sub {ital x}}=2.646 MeV state in {sup 20}Na
- Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 (United States)
- Department of Physics, Yale University, New Haven, Connecticut 06511 (United States)
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)
- Department of Physics and Astronomy, Trinity College, Hartford, Connecticut 06106 (United States)
In energetic nova events, breakout of the hot CNO cycle may proceed via the reaction chain {sup 15}O({alpha},{gamma}){sup 19}Ne(p,{gamma}){sup 20}Na. This triggers a sequence of rapid proton captures and beta decays which can process CNO nuclei to heavier elements (rp-process). The rate of the {sup 19}Ne(p,{gamma}){sup 20}Na reaction is sensitive to resonances in the {sup 19}Ne+p system. The first excited state above the proton threshold of 2.199 MeV in {sup 20}Na (at E{sub {ital x}}=2.646 MeV) is expected to be the most important in determining the reaction rate. The gamma width ({Gamma}{sub {gamma}}) of this state is still unknown and the J{sup {pi}} assignment of this state is currently the subject of debate (1). We have performed {sup 20}Ne({sup 3}He,t{gamma}) experiments to determine the branching ratio {Gamma}{sub {gamma}}/{Gamma} of the E{sub {ital x}}=2.646 MeV excited state in {sup 20}Na. Some preliminary results of these experiments will be presented. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 64311
- Report Number(s):
- CONF-9407131--
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 327; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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