Journal
PHYSICAL REVIEW C
Volume 84, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.84.035802
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Funding
- U.S. Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]
- Science and Technologies Facilities Council
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The reactions Al-26(g)(p,gamma)Si-27 and Al-26(m)(p,gamma)Si-27 are important for influencing the galactic abundance of the cosmic gamma-ray emitter Al-26(g) and for the excess abundance of Mg-26 found in presolar grains, respectively. Precise excitation energies and spin assignments of states from the ground state to the region of astrophysical interest in Si-27, including the identification and pairing of key astrophysical resonances with analog states in the mirror nucleus Al-27, are reported using gamma rays observed in the C-12 + O-16 fusion reaction. The detailed evolution of Coulomb energy differences between the states in Si-27 and Al-27 is explored, including the region above the astrophysical reaction thresholds.
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