Measurement of theNe18(α,p0)Na21Reaction Cross Section in the Burning Energy Region for X-Ray Bursts Academic Article uri icon

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abstract

  • The 18Ne(α,p) 21Na reaction provides one of the main HCNO-breakout routes into the rp process in x-ray bursts. The 18Ne(α,p0) 21Na reaction cross section has been determined for the first time in the Gamow energy region for peak temperatures T∼2  GK by measuring its time-reversal reaction 21Na(p,α) 18Ne in inverse kinematics. The astrophysical rate for ground-state to ground-state transitions was found to be a factor of 2 lower than Hauser-Feshbach theoretical predictions. Our reduced rate will affect the physical conditions under which breakout from the HCNO cycles occurs via the 18Ne(α,p) 21Na reaction.

authors

  • Salter, PJC
  • Aliotta, M
  • Davinson, T
  • Al Falou, H
  • Chen, Alan
  • Davids, B
  • Fulton, BR
  • Galinski, N
  • Howell, D
  • Lotay, G
  • Machule, P
  • Murphy, A StJ
  • Ruiz, C
  • Sjue, S
  • Taggart, M
  • Walden, P
  • Woods, PJ

publication date

  • June 15, 2012