Terrestrial gamma-ray flashes and neutron pulses from direct simulations of gigantic upward atmospheric discharge
Terrestrial gamma-ray flashes and neutron pulses from direct simulations of gigantic upward atmospheric discharge
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来自巨大向上大气放电直接模拟的地面伽马射线闪光和中子脉冲
DOI：
10.1134/s0021364007100037
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发表时间：
2007
期刊：
影响因子：
1.3
通讯作者：
I. Kutsyk
中科院分区：
文献类型：
--
作者：
L. Babich;A. Kudryavtsev;M. Kudryavtseva;I. Kutsyk
利用相对论逃逸电子动力学的多群方法，从自洽电场中向上大气放电的二维数值模拟计算了伽马射线脉冲。计算的γ射线的数目和光谱与在航天器上观测到的地面γ射线闪光的数据是一致的。计算得到的逃逸电子通量主要集中在蓝色喷流荧光区域内。这证明了正是这个区域是γ-射线闪光的来源。一次γ射线闪光产生∼1014-1015个光核中子。
Gamma-ray pulses are calculated from 2D numerical simulations of upward atmospheric discharge in a self-consistent electric field using the multigroup approach to the kinetics of relativistic runaway electrons. Thecalculated numbers and spectra of γ-rays are consistent with the data on terrestrial γ-ray flashes observed aboard spacecraft. The calculated runaway electron flux is concentrated mainly within the domain of the blue jet fluorescence. This proves that exactly this domain is a source of the γ-ray flashes. One γ-ray flash generates ∼1014-1015 photonuclear neutrons.