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arXiv 1608.02897nucl-th
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氘中的中子作为中子诱发反应的替代物

The neutron within the deuteron as a surrogate for neutron-induced reactions

C. A. Bertulani, L. F. Canto, M. S. Hussein, Shubhchintak, Viet Nhan Hao Tran

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16 pages, 4 figures
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摘要：

我们建议使用中子毒物的反应引起的放射性核束作为测试的理论模型，旨在与中子在核中的捕获与中子替代反应，如（d，p）反应。我们利用必要的近似，以获得两个反应之间的直接关系;替代与中子捕获。我们还表明，这是密切相关的中子的动量分布内的氘核。我们使用的模型是基于一般用于处理不完全聚变和替代方法的包容分裂反应理论。这些理论是在80年代由Ichimura，Autern和Vincent [Phys.Rev.C32，431（1985）]，Udagawa和Tamura [Phys.Rev.C24，1348（1981）]以及Hussein和McVoy [Nucl.Phys.A445，124（1985）]发展起来的。我们用这些理论推导出反应A（d，p）B中质子产额的表达式。然后使用合理的近似提取捕获反应$n + A \rightarrow B$。通过回忆Serber提出的一个老方法[Phys.Rev.80，1098（1950）; Nature 166，709（1950）]，我们解释了中子在氘核中的动量分布如何依赖于核子-核子力的短程依赖性。强调了我们的工作与快速中子俘获过程中核合成的相关性。

英文摘要：

We propose the use of neutron poisons in reactions induced by radioactive beams as a test of theoretical models aiming to relate neutron capture in nuclei with neutron surrogate reactions such as (d,p) reactions. We exploit the approximations necessary to obtain a direct relation between the two reactions; surrogate vs. neutron capture. We also show how this is intimately related to the momentum distribution of the neutron within the deuteron. The models we use are based on the theory of inclusive breakup reactions commonly employed in the treatment of incomplete fusion and surrogate method. Such theories were developed in the 80's by Ichimura, Autern and Vincent [Phys. Rev. C 32, 431 (1985)], Udagawa and Tamura [Phys. Rev. C 24, 1348 (1981)] and Hussein and McVoy [Nucl. Phys. A 445, 124 (1985)]. We use these theories to derive an expression for the proton yield in the reaction A(d,p)B. The capture reaction $n + A \rightarrow B$ is then extracted using reasonable approximations. By recalling an old method proposed by Serber [Phys. Rev. 80, 1098 (1950); Nature 166, 709 (1950)] we explain how the momentum distribution of neutrons within the deuteron will depend on the short-range dependence of the nucleon-nucleon force. The relevance of our work to nucleosynthesis in the rapid neutron capture process is emphasized.

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