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VOLUME 85 (2007) | ISSUE 10 | PAGE 589
Terrestrial gamma-ray flashes and neutron pulses from direct simulations of gigantic upward atmospheric discharge
PACS: 94.10.-s, 94.20.-y
Abstract
Gamma-ray pulses are calculated from 2D numerical simulations of upward atmospheric discharge in selfconsistent electric field using multi-group approach to the kinetics of relativistic runaway electrons. Calculated numbers and spectra of γ-rays are consistent with the data on terrestrial γ-ray flashes observed aboard spacecrafts. 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 \sim10^{14}{-}10^{15} photonuclear neutrons.