Physics – Nuclear Physics
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nupha.467..261e&link_type=abstract
Nuclear Physics A, Volume 467, Issue 2, p. 261-272.
Physics
Nuclear Physics
21
Scientific paper
The reaction rates of 25Mg(p, γ)26Al have been calculated at stellar temperatures of T9 = 0.005 to 10 using the data presented in recent capture work. At T9 >0.2, the rates are in good agreement with the results incorporated in a recent compilation. However, near the important temperature range of T9 ~- 0.08 the rates are higher by a factor of about 400. These calculations are uncertain by a factor of two. In addition, the branching f0 to the 26Al ground state approaches a value of f0 ~- 0.80 at T9 < 0.1, while the compilation gives f0 ~- 0.57. The reasons for these changes are discussed. The results increase significantly the abundance of 26Al in various astrophysical scenarios, which produce 26Al via the MgAl cycle near T9 = 0.08, and thus will be of importance for the explanation of extinct 26Al in meteoritic samples as well as of the 4 solar masses of 26Al found in the interstellar medium via γ-ray astronomy.
Endt Pieter M.
Rolfs Claus
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