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

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

来源：Physical Review Letters, 2012, 108(24): 242701.

DOI：10.1103/PhysRevLett.108.242701

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.

• 出版日期2012-6-11