We address the problem of evaluating neutron-transfer induced breakup cross sections caused by the Borromean nucleus Be, using the reaction Au(Be,Be)Au as a test case. This reaction was recently measured over a wide range of incident energies around the Coulomb barrier. To deal with the high density of Au states that can be potentially populated in this reaction, we employ the Ichimura, Austern, Vicent model, in which the spectrum of physical states for this system is replaced by the solutions of a complex n+Au potential, accounting effectively for the fragmentation of single-particle states into physical states. Furthermore, to account for the unbound nature of the emitted Be system, we employ a three-body model of Be. The calculated stripping cross sections are found to be in good agreement with existing data over a wide range of incident energies. The importance of taking into account the energy spread of the single-particle strength of the outgoing Be and the target-like residual nucleus is discussed.

中文翻译：

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中子转移引起的 Borromean 核 9Be 破裂


我们使用 Au(Be,Be)Au 反应作为测试用例，解决评估由博罗米安核 Be 引起的中子转移引起的破裂截面的问题。最近在库仑势垒周围的大范围入射能量上测量了这种反应。为了处理该反应中可能出现的高密度 Au 态，我们采用了 Ichimura、Austern、Vicent 模型，其中该系统的物理态谱被复杂的 n+Au 势的解所取代，有效地解释了单粒子状态分裂为物理状态的情况。此外，为了解释发射 Be 系统的非束缚性质，我们采用了 Be 的三体模型。计算得出的剥离截面与各种入射能量范围内的现有数据非常吻合。讨论了考虑出射 Be 的单粒子强度和靶状残余核的能量扩散的重要性。