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Monitoring of Spatiotemporal Variations in the Production Rates of Cosmogenic Radionuclides in Chondrites of Different Orbits Falling to Earth
Geochemistry International ( IF 0.7 ) Pub Date : 2020-05-01 , DOI: 10.1134/s0016702920050110
G. K. Ustinova , V. A. Alexeev

Abstract— The paper presents data obtained on the production rates of cosmogenic radionuclides of different half-life in 42 chondrites that fell in 1959–2016. A quantitative approach is developed for using cosmogenic radionuclides as natural detectors of galactic cosmic rays (GCR) for different time periods and for different heliocentric distances. A long set of homogeneous data is compiled on 54 Mn, 22 Na, and 26 Al production rates along meteorite orbits (at 2–4 AU) in 1959–2016. Its correlative analysis with the corresponding sets of data on some major parameters of magneto hydrodynamic processes in the heliosphere allows us to identify principal relationships and trends in the temporal and spatial variations in GCR ( E > 100 MeV) in the inner heliosphere (≤5 AU) over a long time scale. The monitoring of this analysis makes it possible both to study these processes in the past and to predict their characteristics in the future, which still cannot be done by means of direct measurements of the GCR intensity in interplanetary space. A project is suggested to demonstrate the expedience of establishing an international meteorite-patrol survey to study spatiotemporal variations in GCR in the inner heliosphere by means of measuring and analyzing the production rates of cosmogenic radionuclides in chondrites falling to Earth. No alternative projects have been put forth as of yet.

中文翻译:

坠落地球的不同轨道球粒陨石中宇宙成因放射性核素产率的时空变化监测

摘要——本文提供了在 1959-2016 年下降的 42 颗球粒陨石中不同半衰期的宇宙放射性核素产生率的数据。开发了一种定量方法,用于将宇宙放射性核素用作不同时间段和不同日心距离的银河宇宙射线 (GCR) 的自然探测器。1959 年至 2016 年,沿陨石轨道(2-4 天文单位)的 54 Mn、22 Na 和 26 Al 产率编制了一系列均质数据。其与日光层磁流体动力学过程的一些主要参数的相应数据集的相关分析使我们能够确定内日光层(≤5 AU)中 GCR(E > 100 MeV)的时空变化的主要关系和趋势。 ) 在很长一段时间内。对这种分析的监测使得既可以研究过去的这些过程又可以预测它们未来的特征,这仍然无法通过直接测量行星际空间的 GCR 强度来完成。建议开展一个项目,通过测量和分析落入地球的球粒陨石中宇宙成因放射性核素的产生率,证明建立国际陨石巡逻调查以研究内日光层 GCR 时空变化的便利性。到目前为止,还没有提出替代项目。建议开展一个项目,通过测量和分析落入地球的球粒陨石中宇宙成因放射性核素的产生率,证明建立国际陨石巡逻调查以研究内日光层 GCR 时空变化的便利性。到目前为止,还没有提出替代项目。建议开展一个项目,通过测量和分析落入地球的球粒陨石中宇宙成因放射性核素的产生率,证明建立国际陨石巡逻调查以研究内日光层 GCR 时空变化的便利性。到目前为止,还没有提出替代项目。
更新日期:2020-05-01
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