Identification of Key Astrophysical Resonances Relevant for the Al26g(p,γ)Si27 Reaction in Wolf-Rayet Stars, AGB stars, and Classical Novae

G. Lotay, P. J. Woods, D. Seweryniak, M. P. Carpenter, R. V. F. Janssens, and S. Zhu
Phys. Rev. Lett. 102, 162502 – Published 22 April 2009

Abstract

A γ-ray spectroscopy study of Al26g+p resonant states in Si27 is presented. Excitation energies were measured with improved precision and first spin-parity assignments made for excited states in Si27 above the proton threshold. The results indicate the presence of low-lying resonances with lp=0 and lp=2 captures that could strongly influence the Al26g(p,γ)Si27 reaction rate at low stellar temperatures, found in low-mass asymptotic giant branch (AGB), intermediate-mass AGB, super AGB, and Wolf-Rayet stars.

  • Figure
  • Figure
  • Received 1 December 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.162502

©2009 American Physical Society

Authors & Affiliations

G. Lotay1, P. J. Woods1, D. Seweryniak2, M. P. Carpenter2, R. V. F. Janssens2, and S. Zhu2

  • 1University of Edinburgh, Edinburgh, EH9 3JZ, United Kingdom
  • 2Argonne National Laboratory, Argonne, Illinois 60439, USA

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Vol. 102, Iss. 16 — 24 April 2009

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