Terrain-dependent shielding factors of cosmic rays on Earth’s surface

IF 1.5 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2026-04-01 Epub Date: 2026-02-02 DOI:10.1016/j.nimb.2026.166017

Dingxiong Chen , Hongtao Shen , Wenqiao Liu , Lingrong Du , Xinya Huang , Weixin Chen , Xu Wang , Jiawen Wang , Fen Luo , Ming He , Qingzhang Zhao , Kimikazu Sasa , Shan Jiang

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引用次数: 0

Abstract

The production rate of cosmogenic nuclides is not only related to altitude and latitude, but also influenced by topographic shielding and the elemental composition of rock layers. Due to topographic obstruction, a shielding factor calculation model must be established in practical geoscientific applications. This study considers five geometric topographic terrains: Sloping terrains, Hemispherical protrusions, Concave spherical cavities, Hemispherical dimples, and Cylindrical cavities. Using MATLAB programs, we numerically computed their respective shielding factors and derived fitted formulas for calculating the shielding factors of these terrains. This facilitates the determination of cosmogenic nuclide concentrations in common landforms for geological studies. The research provides a practical and convenient computational method for estimating the production rate of cosmogenic nuclides and exposure age in geophysical studies.

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地球表面宇宙射线的地形依赖屏蔽因子

宇宙核素的生成速率不仅与海拔和纬度有关，还受地形遮挡和岩层元素组成的影响。在实际地学应用中，由于地形的阻碍，必须建立屏蔽系数的计算模型。本研究考虑了五种几何地形：倾斜地形、半球形凸起、凹球形空腔、半球形凹窝和圆柱形空腔。利用MATLAB程序对不同地形的屏蔽系数进行了数值计算，并推导出相应的屏蔽系数计算公式。这有助于确定地质研究中常见地貌中的宇宙成因核素浓度。该研究为地球物理研究中宇宙核素生成速率和暴露年龄的估算提供了一种实用方便的计算方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 物理-核科学技术

CiteScore

2.80

自引率

7.70%

发文量

231

审稿时长

1.9 months

期刊介绍： Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.