One-proton breakup of 24Si and the 23Al( p, γ )24Si reaction in type I x-ray bursts - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review C Year : 2012

One-proton breakup of 24Si and the 23Al( p, γ )24Si reaction in type I x-ray bursts

A. Banu
  • Function : Author
F. Carstoiu
  • Function : Author
N.L. Achouri
W.N. Catford
  • Function : Author
M. Chartier
  • Function : Author
B. Fernandez-Dominguez
  • Function : Author
M. Horoi
  • Function : Author
N.A. Orr
S. Paschalis
  • Function : Author
N. Patterson
  • Function : Author
B. Pietras
  • Function : Author
B.T. Roeder
  • Function : Author


To understand explosive hydrogen burning in stars and to explore various explosive scenarios such as type I x-ray bursts (XRBs), reliable reaction rates are needed. The cross sections for radiative proton capture on near-dripline nuclei are necessary for the determination of the reaction rates, but cannot be measured directly. Purpose: To determine the reaction rate for the radiative proton capture reaction 23Al(p, γ )24Si using indirect methods and, as a consequence, evaluate if sequential 2p capture on 22Mg seed nuclei is significant at high temperatures. Method: Nonresonant radiative proton capture on 23Al is investigated using the one-proton breakup of 24Si at 61 MeV/nucleon and the asymptotic normalization coefficient (ANC) for 24Sigs → 23Al + p is deduced. Results: From the ANC, the nonresonant component of the astrophysical S-factor for the 23Al(p, γ )24Si reaction is determined and, using other new experimental data the resonant component is re-evaluated. Conclusions: The 23Al(p, γ )24Si reaction is of interest for type I XRB nucleosynthesis and its reaction rate can affect both the 22Na abundance and the total energy output. New determinations of the rates for the 22Mg(p, γ )23Al(p, γ )24Si reaction chain are provided here and we point to the need that they be included in XRB scenarios.

Dates and versions

in2p3-00719389 , version 1 (19-07-2012)



A. Banu, F. Carstoiu, N.L. Achouri, W.N. Catford, M. Chartier, et al.. One-proton breakup of 24Si and the 23Al( p, γ )24Si reaction in type I x-ray bursts. Physical Review C, 2012, 86, pp.015806. ⟨10.1103/PhysRevC.86.015806⟩. ⟨in2p3-00719389⟩
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