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Inverse Kinematic Study of the Al-26g(d,p)Al-27 Reaction and Implications for Destruction of Al-26 in Wolf-Rayet and Asymptotic Giant Branch Stars

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Original languageEnglish
Article number062701
Number of pages5
JournalPhysical Review Letters
Volume115
Issue number6
DOIs
StatePublished - 5 Aug 2015

Abstract

In Wolf-Rayet and asymptotic giant branch (AGB) stars, the Al-26g(p,gamma)Si-27 reaction is expected to govern the destruction of the cosmic.-ray emitting nucleus Al-26. The rate of this reaction, however, is highly uncertain due to the unknown properties of key resonances in the temperature regime of hydrogen burning. We present a high-resolution inverse kinematic study of the Al-26g(d,p)Al-27 reaction as a method for constraining the strengths of key astrophysical resonances in the Al-26g(p,gamma)Si-27 reaction. In particular, the results indicate that the resonance at E-r = 127 keV in Si-27 determines the entire Al-26g(p,gamma)Si-27 reaction rate over almost the complete temperature range of Wolf-Rayet stars and AGB stars.

    Research areas

  • EARLY SOLAR-SYSTEM, EMISSION-LINES, MASSIVE STARS, NUCLEI, DECAY

ID: 21602780