Measurement of the Ne-18(alpha, p(0))Na-21 Reaction Cross Section in the Burning Energy Region for X-Ray Bursts

P. J. C. Salter, M. Aliotta, T. Davinson, H. Al Falou, A. Chen, B. Davids, B. R. Fulton, N. Galinski, D. Howell, G. Lotay, P. Machule, A. StJ Murphy, C. Ruiz, S. Sjue, M. Taggart, P. Walden, P. J. Woods

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The Ne-18(alpha, p(0))Na-21 reaction provides one of the main HCNO-breakout routes into the rp process in x-ray bursts. The Ne-18(alpha, p(0))Na-21 reaction cross section has been determined for the first time in the Gamow energy region for peak temperatures T similar to 2 GK by measuring its time-reversal reaction Na-21(alpha, p(0))Ne-18 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 Ne-18(alpha, p(0))Na-21 reaction.

Original languageEnglish
Article number242701
Pages (from-to)-
Number of pages5
JournalPhysical Review Letters
Issue number24
Publication statusPublished - 11 Jun 2012

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