TETRA observation of gamma-rays at ground level associated with nearby thunderstorms

被引：24

作者：

Ringuette, Rebecca ^{[1
]}

Case, Gary L. ^{[1
]}

Cherry, Michael L. ^{[1
]}

Granger, Douglas ^{[1
]}

Guzik, T. Gregory ^{[1
]}

Stewart, Michael ^{[1
]}

Wefel, John P. ^{[1
]}

机构：

[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2013年 / 118卷 / 12期

关键词：

terrestrial gamma flashes; FLASHES; BREAKDOWN; AIR;

D O I：

10.1002/2013JA019112

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Terrestrial gamma-ray flashes (TGFs)very short, intense bursts of electrons, positrons, and energetic photons originating from terrestrial thunderstormshave been detected with satellite instruments. TGF and Energetic Thunderstorm Rooftop Array (TETRA), an array of NaI(Tl) scintillators at Louisiana State University, has now been used to detect similar bursts of 50keV to over 2MeV gamma-rays at ground level. After 2.6years of observation, 24 events with durations 0.02-4.2ms have been detected associated with nearby lightning, three of them coincident events observed by detectors separated by similar to 1000m. Nine of the events occurred within 6ms and 5 km of negative polarity cloud-to-ground lightning strokes with measured currents in excess of 20kA. The events reported here constitute the first catalog of TGFs observed at ground level in close proximity to the acceleration site.

引用

页码：7841 / 7849

页数：9

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