Understanding the 11B(p, α)αα reaction at the 0.675 MeV resonance
Understanding the 11B(p, α)αα reaction at the 0.675 MeV resonance
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DOI：
10.1016/j.physletb.2010.12.015
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发表时间：
2011-01-24
影响因子：
4.4
通讯作者：
Weller, H. R.
中科院分区：
文献类型：
--
作者：
Stave, S.;Ahmed, M. W.;Weller, H. R.
B-11（p，alpha）alpha alpha反应的能量在200 keV和几MeV之间，有着非常悠久的历史，可以追溯到卢瑟福勋爵、迪和吉尔伯特在20世纪30年代的研究。结果表明，1987年建立的关于这种反应的现代观点是不正确的。该模型将反应视为两步过程，其中l = 1的初级高能α粒子进入Be-8的第一激发态。随后发射两个低能次级α粒子。我们已经发现，较早的一个结果（1969年）表明初级α粒子必须具有l = 3，正如最初所指出的那样，确实解释了这些数据。我们的模拟表明，这种观点导致了两种高能α粒子（能量几乎相等）的预测，正如最初在1936年提出的那样，一种是初级α粒子，另一种是次级α粒子。符合数据证实了这两种高能α粒子的存在。这一结果对天体物理学和聚变能生产的影响。(C)2010 Elsevier BV保留所有权利。
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. (C) 2010 Elsevier B.V. All rights reserved.