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Title: Constraint of the Astrophysical Al26g(p,γ)Si27 Destruction Rate at Stellar Temperatures

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,γ)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. Finally, 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.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [6] ;  [7] ;  [8] ;  [1] ;  [9] ;  [3] ;  [7] ;  [1] ;  [10] ;  [6] ;  [9] ;  [7] ;  [11] ;  [7] more »;  [8] ;  [1] ;  [1] ;  [1] ;  [4] « less
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division; Univ. of Notre Dame, IN (United States). Dept. of Physics
  3. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
  4. Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
  5. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Sungkyunkwan Univ., Suwon (Republic of Korea). Dept. of Physics
  6. Rutgers Univ., New Brunswick, NJ (United States). Dept. of Physics and Astronomy
  7. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
  8. Tennessee Technological Univ., Cookeville, TN (United States). Dept. of Physics
  9. Oak Ridge Associated Univ., Oak Ridge, TN (United States)
  10. Polish Academy of Sciences (PAS), Krakow (Poland). Inst. of Nuclear Physics
  11. 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)
Publication Date:
OSTI Identifier:
1185717
Grant/Contract Number:
AC05-00OR22725; FG02-96ER40955; FG02-96ER40990; FG02-96ER40983; SC0001174; PHY0354870; PHY0757678; NRF- 2014S1A2A2028636; PP/ F000715/1; FG52-08NA28552
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 21; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Holifield Radioactive Ion Beam Facility (HRIBF)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS