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Production of ~7Be Nuclei in the Earth's Upper Atmosphere from Galactic Cosmic Rays and Solar Energetic Particles

机译:从银河宇宙射线和太阳能粒子的地球高层大气中生产〜7be核

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Galactic cosmic rays (GCR) produce ~7Be radioactive nuclei from nuclear interactions with the atmospheric N and O nuclei.In addition,extraordinarily intense solar energetic particles (SEP) associated with a great coronal mass ejection (CME) event contribute to production of ~7Be nuclei,though a frequency of such solar proton event is very low and its duration is less than a few days.The SEP proton spectrum is so steep that most of ~7Be is produced in a thin top layer of the polar atmosphere.We calculate the global average ~7Be production rate in the upper atmosphere taking account both GCR and SEP protons.The production rate of ~7Be by the intense SEP event increases about a few tens times that by GCR.We compare the present calculation with the measurement of ~7Be and discuss the SEP effect to ~7Be production.
机译:从核相互作用与大气N和O核的核相互作用产生〜7be放射性核。添加,与大冠状大众射入(CME)事件相关的非常强烈的太阳能粒子(SEP)有助于生产〜7be核心,尽管这种太阳能质子事件的频率非常低,但其持续时间小于几天。SEP质子谱是如此陡峭,大多数〜7BE在极性大气的薄顶层中产生。我们计算了全球平均水平〜7BE在高层大气层中的生产率考虑到GCR和SEP质子。激烈的SEP事件的生产率〜7be的产量增加了大约几十多的时间,即GCR。我们将目前的计算与〜7be的测量相比并讨论SEP效应到〜7BE生产。

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