First in-beam {gamma}-ray spectroscopy study of {sup 24}Al and its implications for the astrophysical {sup 23}Mg(p,{gamma}){sup 24}Al reaction rate in ONe novae
- Univeristy of Edinburgh, Edinburgh EH9 3JZ (United Kingdom)
- Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Univeristy of Maryland, College Park, Maryland 20742 (United States)
- University of York, Heslington Y010 5DD (United Kingdom)
The first in-beam {gamma}-ray spectroscopy study of {sup 24}Al is presented. A complete level structure of {sup 24}Al incorporating all states below the proton-emission threshold, has been constructed. The first excited state above the proton threshold has also been identified as a 3{sup +} state at 2345.1 {+-} 1.4 keV. This state, corresponding to a resonance energy of 473 {+-} 3 keV, has been suggested to be the dominant resonance contributing to the {sup 23}Mg(p,{gamma}){sup 24}Al stellar reaction rate. The improved precision of the level energy and unambiguous assignment of the state has reduced the uncertainty of the {sup 23}Mg(p,{gamma}){sup 24}Al stellar reaction rate, which constrains the production of A>20 nuclei in ONe novae.
- OSTI ID:
- 21189890
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 77, Issue 4; Other Information: DOI: 10.1103/PhysRevC.77.042802; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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