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On the Terrestrial Gamma Ray Flashes Preceding Narrow Bipolar Events

文献类型：期刊论文

作者HXMT
刊名Geophysical Research Letters
出版日期2021
卷号48页码:e92160
关键词low frequency magnetic sferics narrow bipolar events (NBEs) relativistic feedback mechanism Terrestrial Gamma ray Flashes (TGFs) Abstract: Narrow bipolar events (NBEs) are occasionally reported to occur within a few ms after Terrestrial Gamma ray Flashes (TGFs), while the formation mechanism remains mysterious partially due to the lack of sufficient observations. Here, nine more TGFs of this scenario are reported with concurrent LF sferics and lightning location data. The gamma ray production in these TGFs preceded the occurrence of NBEs by a minimum of 60 µs up to 13.5 ms, and no other fast leader discharge was found within 20 ms before the TGF. The TGF preceded positive NBEs occurred at altitudes of 8.6-11 km in thunderstorms, likely in the high electric field (E field) region of lightning initiation. The analyses show that the NBE preceding TGFs bear harder energy spectrum with larger proportion of high energy photons than EIP related TGFs produced in association with lightning leader. Our findings support the relativistic feedback mechanism of gamma ray generation in the large scale thunderstorm E field.
ISSN号0094-8276
DOI10.1029/2020gl092160
文献子类Journal Article
语种英语
源URL[http://ir.ihep.ac.cn/handle/311005/291333]  
专题硬X射线调制望远镜卫星
推荐引用方式
GB/T 7714		 HXMT. On the Terrestrial Gamma Ray Flashes Preceding Narrow Bipolar Events[J]. Geophysical Research Letters,2021,48:e92160.
APA HXMT.(2021).On the Terrestrial Gamma Ray Flashes Preceding Narrow Bipolar Events.Geophysical Research Letters,48,e92160.
MLA HXMT."On the Terrestrial Gamma Ray Flashes Preceding Narrow Bipolar Events".Geophysical Research Letters 48(2021):e92160.

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来源：高能物理研究所

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