Astrophysically important {sup 26}Si states studied with the {sup 28}Si(p,t){sup 26}Si reaction. II. Spin of the 5.914-MeV {sup 26}Si level and galactic {sup 26}Al production
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Physics Department, Tennessee Technological University, Cookeville, Tennessee 38505 (United States)
- Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701 (United States)
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 (United States)
- Oak Ridge Associated Universities, Bldg 6008, P. O. Box 2008, Oak Ridge, Tennessee 37831 (United States)
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854 (United States)
- Department of Physics, Colorado School of Mines, Golden, Colorado 80401 (United States)
- Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599 (United States)
The {sup 28}Si(p,t){sup 26}Si reaction has been studied to resolve a controversy surrounding the properties of the {sup 26}Si level at 5.914 MeV and its contribution to the {sup 25}Al(p,{gamma}){sup 26}Si reaction rate in novae, which affects interpretations of galactic {sup 26}Al observations. Recent studies have come to contradictory conclusions regarding the spin of this level (0{sup +} or 3{sup +}), with a 3{sup +} assignment implying a large contribution by this level to the {sup 25}Al(p,{gamma}){sup 26}Si reaction rate. We have extended our previous study [Bardayan et al., Phys. Rev. C 65, 032801(R) (2002)] to smaller angles and find the angular distribution of tritons populating the 5.914-MeV level in the {sup 28}Si(p,t){sup 26}Si reaction to be consistent with either a 2{sup +} or 3{sup +} assignment. We have calculated reaction rates under these assumptions and used them in a nova nucleosynthesis model to examine the effects of the remaining uncertainties in the {sup 25}Al(p,{gamma}){sup 26}Si rate on {sup 26}Al production in novae.
- OSTI ID:
- 20863893
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 74, Issue 4; Other Information: DOI: 10.1103/PhysRevC.74.045804; (c) 2006 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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