Understanding the B-11(p, alpha)alpha alpha reaction at the 0.675 MeV resonance

作者：Stave S^*; Ahmed M W; France R H III; Henshaw S S; Muellner B; Perdue B A; Prior R M; Spraker M C; Weller H R

来源：Physics Letters B, 2011, 696(1-2): 26-29.

DOI：10.1016/j.physletb.2010.12.015

• Low energy nuclear reactions
• Proton induced reactions
• Three alpha-particle final states

The B-11(p, alpha)alpha alpha reaction at energies between 200 key and a few MeV has a very long history, dating back to studies by Lord Rutherford and Dee and Gilbert in the 1930s. It is shown that the modern view of this reaction, established in 1987, is incorrect. This model viewed the reaction as a two-step process with a primary high energy alpha-particle having l = 1 going to the first excited state of Be-8. with the subsequent emission of two low energy secondary alpha-particles. We have found that an earlier result (1969) which showed that the primary alpha-particle must have l = 3 does, as originally noted, account for the data. Our simulations show that this view leads to the prediction of two high energy alpha-particles (of almost equal energy), as originally proposed in 1936, one being the primary alpha-particle and the other a secondary alpha-particle. Coincidence data verify the existence of these two high energy alpha-particles. The implications of this result on astrophysics and fusion energy production are noted.

• 出版日期2011-1-24