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Physics-based modeling of cosmogenic nuclides part I - Radiation transport methods and new insights

机译:基于物理的宇宙成因核素建模第一部分-辐射传输方法和新见解

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We present a comprehensive, nuclear-physics-based cosmogenic nuclide production rate model combining radiation transport modeling with excitation functions for commonly measured nuclides. This model allows investigation of factors influencing nuclide production, such as the energy spectrum and angular distribution of the incident radiation that cannot be easily isolated in calibration measurements on natural samples. We present neutron and proton fluxes over a range of atmospheric depths and cut-off rigidities. Calculated production rates for He-3, Be-10, C-14, Ne-21, Al-26 and Cl-36 based on these fluxes are presented. The model predicts that production rates for these nuclides diverge from one another with altitude, hence that production ratios depend on altitude. Compared to existing scaling schemes, the model predicts a larger difference between sea-level production rates at low and high latitude. (C) 2014 Elsevier B.V. All rights reserved.
机译:我们提出了一个综合的,基于核物理学的宇宙成因核素生产率模型,该模型结合了辐射传输模型和通常测量的核素的激发函数。该模型可以研究影响核素生成的因素,例如入射光谱的能量谱和角度分布,这些在自然样品的校准测量中不容易被隔离。我们介绍了在一定范围的大气深度和截止刚度范围内的中子和质子通量。给出了基于这些通量计算出的He-3,Be-10,C-14,Ne-21,Al-26和Cl-36的生产率。该模型预测,这些核素的生产率随海拔高度而彼此不同,因此生产率比取决于海拔高度。与现有的缩放方案相比,该模型预测低纬度和高纬度的海平面生产率之间存在较大差异。 (C)2014 Elsevier B.V.保留所有权利。

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