标题： 宇宙射线模型用于早期银河锂、铍和硼的产生 显示英文标题

标题： Cosmic Ray Models for Early Galactic Lithium, Beryllium, and Boron Production

摘要： 为了更好地理解宇宙射线散裂和聚变反应在早期银河系中产生锂、铍和硼的情况，研究了这些产率对宇宙射线模型和模型参数的依赖性。 元素和同位素产率对宇宙射线路径长度大小和能量依赖性、源谱、散裂运动学以及截面不确定性的敏感性得到了研究。 这些模型特征的变化，特别是与约束相关的特征，被证明会改变铍和硼相对于铁的斜率{}，使其偏离简单的二次关系。 我们的结果对弥散$\gamma$-射线背景的含义进行了探讨，并注意到了化学演化及其与我们结果的关系。 还注意到，$\alpha+\alpha$聚变的未测量高能行为可能导致最终产率出现高达两倍的影响。 未来的数据应能够使 第二星族锂、铍和硼丰度对早期银河系的宇宙射线模型进行限制。 显示英文摘要

摘要： To understand better the early galactic production of Li, Be, and B by cosmic ray spallation and fusion reactions, the dependence of these production rates on cosmic ray models and model parameters is examined. The sensitivity of elemental and isotopic production to the cosmic ray pathlength magnitude and energy dependence, source spectrum, spallation kinematics, and cross section uncertainties is studied. Changes in these model features, particularly those features related to confinement, are shown to alter the Be- and B-versus-Fe slopes {}from a na\"{\i}ve quadratic relation. The implications of our results for the diffuse $\gamma$-ray background are examined, and the role of chemical evolution and its relation to our results is noted. It is also noted that the unmeasured high energy behavior of $\alpha+\alpha$ fusion can lead to effects as large as a factor of 2 in the resultant yields. Future data should enable Population II Li, Be, and B abundances to constrain cosmic ray models for the early Galaxy.