A new set of Double-Differential FRaGmentation (DDFRG) models for proton and light ion production from high energy nucleus–nucleus collisions, relevant to space radiation, is introduced. The proton model employs thermal production from the projectile, central fireball and target sources, as well as quasi-elastic direct knockout production. The light ion model uses a hybrid coalescence model. The data show a prominent quasi-elastic peak at small angles which becomes highly suppressed at large angles. The models are able to describe this wide range of experimental data with only a limited set of model parameters. Closed form analytic formulas for double-differential energy and angle cross-sections as well as single-differential spectral cross-sections are developed. These analytic formulas enable highly efficient computation for radiation transport codes.

引入了一套新的双微分FRaGmentation（DDFRG）模型，用于从高能核-核碰撞产生质子和光离子，与空间辐射有关。质子模型利用了射弹，中央火球和目标源的热量产生，以及准弹性直接击倒产生。光离子模型使用混合合并模型。数据显示在小角度处有一个突出的准弹性峰，在大角度处被高度抑制。这些模型仅用有限的一组模型参数就可以描述广泛的实验数据。建立了双微分能量和角度横截面以及单微分光谱横截面的封闭形式解析公式。