Constraint of the Astrophysical Destruction Rate at Stellar Temperatures
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division; Univ. of Notre Dame, IN (United States). Dept. of Physics
- Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
- Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Sungkyunkwan Univ., Suwon (Republic of Korea). Dept. of Physics
- Rutgers Univ., New Brunswick, NJ (United States). Dept. of Physics and Astronomy
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
- Tennessee Technological Univ., Cookeville, TN (United States). Dept. of Physics
- Oak Ridge Associated Univ., Oak Ridge, TN (United States)
- Polish Academy of Sciences (PAS), Krakow (Poland). Inst. of Nuclear Physics
- Centre National de la Recherche Scientifique (CNRS), Caen (France). Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), Grand Accelerateur National d'Ions Lourds (GANIL)
The Galactic 1.809-MeV γ-ray signature from the β decay of 26gAl is a dominant target of γ-ray astronomy, of which a significant component is understood to originate from massive stars. The 26gAl(p,g)27Si reaction is a major destruction pathway for 26gAl at stellar temperatures, but the reaction rate is poorly constrained due to uncertainties in the strengths of low-lying resonances in 27Si. The 26gAl(d,p)27Al reaction has been employed in inverse kinematics to determine the spectroscopic factors, and hence resonance strengths, of proton resonances in 27Si via mirror symmetry. Furthermore, the strength of the 127-keV resonance is found to be a factor of 4 higher than the previously adopted upper limit, and the upper limit for the 68-keV resonance has been reduced by an order of magnitude, considerably constraining the 26gAl destruction rate at stellar temperatures.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Holifield Radioactive Ion Beam Facility (HRIBF); Rutgers Univ., New Brunswick, NJ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC05-00OR22725; FG02-96ER40955; FG02-96ER40990; FG02-96ER40983; SC0001174; PHY0354870; PHY0757678; NRF- 2014S1A2A2028636; PP/ F000715/1; FG52-08NA28552; NA0002132
- OSTI ID:
- 1185717
- Alternate ID(s):
- OSTI ID: 1183246; OSTI ID: 1319742
- Journal Information:
- Physical Review Letters, Vol. 114, Issue 21; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Transfer reactions in nuclear astrophysics
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journal | February 2016 |
Resonances above the proton threshold in
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journal | March 2016 |
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