Constraint of the Astrophysical $^{26g}$Al(p;γ)$^{27}$Si Destruction Rate at Stellar Temperatures - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review Letters Year : 2015

Constraint of the Astrophysical $^{26g}$Al(p;γ)$^{27}$Si Destruction Rate at Stellar Temperatures

S.D. Pain
  • Function : Author
D.W. Bardayan
  • Function : Author
J.C. Blackmon
  • Function : Author
S.M. Brown
  • Function : Author
K.Y. Chae
  • Function : Author
K.A. Chipps
  • Function : Author
J.A. Cizewski
  • Function : Author
K.L. Jones
  • Function : Author
R.L. Kozub
  • Function : Author
J.F. Liang
  • Function : Author
C. Matei
  • Function : Author
M. Matos
  • Function : Author
B.H. Moazen
  • Function : Author
C.D. Nesaraja
  • Function : Author
J. Okolowicz
  • Function : Author
P.D. O’malley
  • Function : Author
W.A. Peters
  • Function : Author
S.T. Pittman
  • Function : Author
M. Ploszajczak
  • Function : Author
  • PersonId : 987277
K.T. Schmitt
  • Function : Author
J.F. Shriner
  • Function : Author
D. Shapira
  • Function : Author
M.S. Smith
  • Function : Author
D.W. Stracener
  • Function : Author
G.L. Wilson
  • Function : Author

Abstract

The Galactic 1.809-MeV γ-ray signature from the β decay of $^{26g}$Al is a dominant target of γ-ray astronomy, of which a significant component is understood to originate from massive stars. The $^{26g}$Al(p; γ)$^{27}$Si reaction is a major destruction pathway for $^{26g}$Al at stellar temperatures, but the reaction rate is poorly constrained due to uncertainties in the strengths of low-lying resonances in $^{27}$Si. The $^{26g}$Al(d; p)$^{27}$Al reaction has been employed in inverse kinematics to determine the spectroscopic factors, and hence resonance strengths, of proton resonances in $^{27}$Si via mirror symmetry. The strength of the 127-keV resonance is found to be a factor of 4 higher than the previously adopted upper limit, and the upper limit for the 68-keV resonance has been reduced by an order of magnitude, considerably constraining the $^{26g}$Al destruction rate at stellar temperatures.

Dates and versions

in2p3-01158394 , version 1 (01-06-2015)

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S.D. Pain, D.W. Bardayan, J.C. Blackmon, S.M. Brown, K.Y. Chae, et al.. Constraint of the Astrophysical $^{26g}$Al(p;γ)$^{27}$Si Destruction Rate at Stellar Temperatures. Physical Review Letters, 2015, 114 (21), pp.212501. ⟨10.1103/PhysRevLett.114.212501⟩. ⟨in2p3-01158394⟩
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