arXiv 2103.111622021-03-20nucl-thastro-ph.SR

4 He-质子碰撞总截面、吸收截面、3 He和3 H产生截面的能量依赖模型

Model of Energy Dependent Total, Absorption, and 3He and 3H Production Cross Sections in 4He-proton Collisions

Congchong Yan, Premkumar B. Saganti, Francis A. Cucinotta

DOI：: 10.1016/j.nimb.2021.06.013

摘要：

轻离子（A<5）分裂截面对于研究星际介质中宇宙线的相互作用以及能量在生物组织中的沉积等辐射防护问题具有重要意义。重离子反应的核子磨蚀截面通常采用大质量极限下的Glauber模型或光学势模型的Eikonal形式计算。在这里，我们制定了一个磨损模型4 He核碎裂氢目标与经典模型的最终状态相互作用。与重离子磨损模型进行了比较。计算了~ 4 He在质子靶作用下生成~ 3 He或~ 3 H的总截面、吸收截面、弹性截面和分裂截面，这些截面与能量相关，与实验测量值吻合较好。轻核的Glauber模型和模型的大质量极限被证明是在接近协议的4 He质子相互作用超过300 MeV/u，但重要的差异发生在较低的能量。

英文摘要：

Light ion (A<5) breakup cross sections are important for studies of cosmic ray interactions in the inter-stellar medium or radiation protection considerations of energy deposition in tissue. Nucleon abrasion cross sections for heavy ion reactions are often calculated using the Glauber model in the large mass limit or with the Eikonal form of the optical potential model. Here we formulate an abrasion model for 4He nuclei fragmentation on hydrogen targets with a classical model for final state interactions. Comparisons to the heavy ion abrasion model are made. Calculations of energy dependent total, absorption, elastic and breakup cross sections for 4He into 3He or 3H with protons targets are shown to be in good agreement with experimental measurements for energies from 100 to 100,000 MeV/u. The Glauber model for light nuclei and the large mass limit to the model are shown to be in close agreement for 4He-proton interactions above 300 MeV/u, however important differences occur at lower energies.

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