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

V. Margerin, G. Lotay*, P. J. Woods, M. Aliotta, G. Christian, B. Davids, T. Davinson, D. T. Doherty, J. Fallis, D. Howell, O. S. Kirsebom, D. J. Mountford, A. Rojas, C. Ruiz, J. A. Tostevin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In Wolf-Rayet and asymptotic giant branch (AGB) stars, the 26gAl(p,γ)27Si reaction is expected to govern the destruction of the cosmic γ-ray emitting nucleus 26Al. 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 26gAl(d,p)27Al reaction as a method for constraining the strengths of key astrophysical resonances in the 26gAl(p,γ)27Si reaction. In particular, the results indicate that the resonance at Er=127  keV in 27Si determines the entire 26gAl(p,γ)27Si reaction rate over almost the complete temperature range of Wolf-Rayet stars and AGB stars.

Original languageEnglish
Article number062701
Pages (from-to)1-5
Number of pages5
JournalPhysical Review Letters
Volume115
Issue number6
Early online date5 Aug 2015
DOIs
Publication statusPublished - 7 Aug 2015

Keywords

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

Cite this