Cucinotta F A, Townsend L W, Wilson J W, Shinn J L, Badhwar G D, Dubey R R
NASA Langley Research Center, Hampton, VA 23681-0001, USA.
Adv Space Res. 1996;17(2):77-86. doi: 10.1016/0273-1177(95)00515-g.
Light nuclei are present in the primary galactic cosmic rays (GCR) and are produced in thick targets due to projectile or target fragmentation from both nucleon and heavy ion induced reactions. In the primary GCR, 4He is the most abundant nucleus after 1H. However, there are also a substantial fluxes of 2H and 3He. In this paper we describe theoretical models based on quantum multiple scattering theory for the description of light ion nuclear interactions. The energy dependence of the light ion fragmentation cross section is considered with comparisons of inclusive yields and secondary momentum distributions to experiments described. We also analyze the importance of a fast component of lights ions from proton and neutron induced target fragmentation. These theoretical models have been incorporated into the cosmic ray transport code HZETRN and will be used to analyze the role of shielding materials in modulating the production and the energy spectrum of light ions.
轻核存在于初级银河宇宙射线（GCR）中，并且由于核子和重离子诱发反应产生的弹丸或靶碎片，在厚靶中产生。在初级GCR中，4He是仅次于1H的最丰富的核。然而，也有大量的2H和3He通量。在本文中，我们描述了基于量子多重散射理论的理论模型，用于描述轻离子核相互作用。考虑了轻离子碎裂截面的能量依赖性，并将包含产额和二次动量分布与所述实验进行了比较。我们还分析了质子和中子诱发靶碎裂产生的轻离子快速成分的重要性。这些理论模型已被纳入宇宙射线传输代码HZETRN，并将用于分析屏蔽材料在调节轻离子产生和能谱方面的作用。
