Hardening and Termination of Long-Duration Gamma Rays Detected Prior to Lightning
Hardening and Termination of Long-Duration Gamma Rays Detected Prior to Lightning
复制标题
闪电前检测到的长持续时间伽马射线的硬化和终止
DOI：
10.1103/physrevlett.111.015001
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
et al.
中科院分区：
文献类型：
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作者：
H. Tsuchiya;T. Enoto;et al.
我们报告的第一个观察3-30兆电子伏的长期γ射线发射突然终止闪电。2010年12月30日，在日本海沿着地区进行的冬季雷暴云伽马射线观测实验中，在冬季雷暴期间进行了伽马射线探测。伽马射线通量持续不到3分钟，不断硬化接近闪电发生。在3-10 MeV能量下的硬化是最突出的。在距实验场地5公里的闪电前不到800毫秒，伽马射线通量突然停止。此外，我们还观察到，<?format ?> 3-10 MeV伽马射线和其他射线的发射面积，表明伽马射线的发射面积比低能伽马射线的发射面积小得多。这项工作可能表明，发射长时间伽马射线的局部区域与遥远的区域相连，从而引发闪电。
We report the first observation of 3–30 MeV prolonged gamma-ray emission that was abruptly terminated by lightning. The gamma-ray detection was made during winter thunderstorms on December 30, 2010, by the Gamma-Ray Observation of Winter Thunderclouds experiment carried out in a coastal area along the Sea of Japan. The gamma-ray flux lasted for less than 3 min, continuously hardening closer to the lightning occurrence. The hardening at energies of 3–10 MeV energies was most prominent. The gamma-ray flux abruptly ceased less than 800 ms before the lightning flash that occurred over 5 km away from the experimental site. In addition, we observed a clear difference in the duration <?format ?>of the 3–10 MeV gamma rays and those, suggesting that the area ofgamma-ray emission is considerably smaller than that of the lower-energy gamma rays. This work may give a manifestation that a local region emitting prolonged gamma rays connects with a distant region to initiate lightning.