论文标题
与Dragon2代码的宇宙射线相互作用的Fluka横截面
FLUKA cross sections for cosmic-ray interactions with the DRAGON2 code
论文作者
论文摘要
宇宙射线与星际气体的散布反应产生的二级颗粒提供了有价值的信息，使我们能够研究银河系中带电颗粒的注射和运输。尽管现有的实验数据非常稀缺和不确定，但对这些颗粒生产的横截面的良好理解对于正确解释我们的模型至关重要。我们已经开发了一组新的横截面，包括弹性和包容性，并使用{\ tt fluka}蒙特卡洛核密码计算，并测试了其与CR数据的兼容性。将非弹性和包容性的横截面与最新的数据和参数化相提并论。然后，这些横截面已在{\ tt dragon2}代码中实现，以表征cr核的光谱高达$ z = 26 $，并且B，be and be and be and be和li。有趣的是，我们发现Fluka横截面使我们能够预测B，BE和LI通量比的能量依赖性，该比率与AMS-02数据兼容，并同时再现这些通量比，其缩放比例低于$ 20 \％$。最后，在{\ tt gammasky}代码中，我们实施了用{\ tt fluka}计算的伽玛射线生产的横截面，并计算了与Fermi大型区域望远镜数据相当良好的一致性。
Secondary particles produced in spallation reactions of cosmic rays with the interstellar gas provide valuable information that allow us to investigate the injection and transport of charged particles in the Galaxy. A good understanding of the cross sections of production of these particles is crucial to correctly interpret our models, although the existing experimental data is very scarce and uncertain. We have developed a new set of cross sections, both inelastic and inclusive, computed with the {\tt FLUKA} Monte Carlo nuclear code and tested its compatibility with CR data. Inelastic and inclusive cross sections have been compared to the most up-to-date data and parameterisations finding a general good agreement. Then, these cross sections have been implemented in the {\tt DRAGON2} code to characterize the spectra of CR nuclei up to $Z=26$ and the secondary-to-primary ratios of B, Be and Li. Interestingly, we find that the FLUKA cross sections allow us to predict an energy-dependence of the B, Be and Li flux ratios which is compatible with AMS-02 data and to reproduce simultaneously these flux ratios with a scaling lower than $20\%$. Finally, we implement the cross sections of production of gamma rays, calculated with {\tt FLUKA}, in the {\tt Gammasky} code and compute diffuse gamma-ray sky maps and the local HI emissivity spectrum, finding a very good agreement with Fermi Large Area Telescope data.
