Comment on "Long lasting low energy thunderstorm ground enhancements and possible Rn-222 daughter isotopes contamination"статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 3 июля 2019 г.
Аннотация:Large enhancements of gamma-ray radiation relative to the stable background are often observed during (cosmic and terrestrial) thunderstorms [1–3]. The problem of observing additional gamma-ray sources (besides the known cosmic and terrestrial sources) is connected with the determination of the energy and temporal characteristics of this new phenomenon in comparison with previous ones in an attempt to find any differences in their physical parameters. These phenomena — called thunderstorm ground enhancements (TGEs)— can be caused by bremsstrahlung radiation of electrons accelerated in the thundercloud’s electrical field. The background increase can also be connected with gamma rays emitted by natural radioactiveisotopes such as Rn-222 and its daughter nuclei like Pb-214 and Bi-214 that are present in the atmosphere, including in thunderstorm clouds and raindrops. The change of conditions for Rn-222 emanation can also cause an increase in the gamma-ray background. We indicate wet soil and aerosol transport by wind as possible conditions for such increased emanation. This can be associated with convection (active cumulus or cumulonimbus cloud formation) or with frontal systems. All mentioned factors work together,leadingto the appearance of TGEs with different temporal and spectral parameters.