Investigating the astrophysically important E{sub x} = 2.646 MeV state in {sup 20}Na
Conference
·
OSTI ID:199735
- Univ. of North Carolina, Chapel Hill, NC (United States)
Observations of Neon lines in the spectra of energetic novae have prompted a renewed look at explosive hydrogen burning. The {sup 19}Ne(p,{gamma}){sup 20}Na reaction is expected to play a major role in the breakout of the hot CNO cycle to the rp-process, which can process CNO nuclei to heavier elements. The reaction rate is dominated by the lowest resonance in the {sup 19}Ne + p system, corresponding to the E{sub x} = 2.646 MeV state in {sup 20}Na. A large variety of nuclear experimental techniques have been used to study this state; e.g. charge exchange reactions, {beta}-delayed proton decay and radioactive beams. Their results have lead to a J{sup pi}= 3{sup +} assignment for this state allowing an estimate of the proton width ({Gamma}{sub p}). This leaves the gamma width ({Gamma}{sub gamma}) to be determined. The authors have performed {sup 20}Ne({sup 3}He,t{gamma}) experiments to measure the branching ratio ({Gamma}{sub gamma}/{Gamma}) of the E{sub x}= 2.646 MeV excited state in {sup 20}Na. Details of this experiment and its results will be discussed.
- DOE Contract Number:
- FG05-88ER40442
- OSTI ID:
- 199735
- Report Number(s):
- CONF-941129--
- Country of Publication:
- United States
- Language:
- English
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