التفاصيل البيبلوغرافية
| العنوان: |
Hardening and Termination of Long-Duration y Rays Detected Prior to Lightning. |
| المؤلفون: |
Tsuchiya, H.1,2, Enoto, T.2,3, Iwata, K.4, Yamada, S.2, Yuasa, T.5, Kitaguchi, T.2, Kawaharada, M.5, Nakazawa, K.6, Kokubun, M.5, Kato, H.2, Okano, M.2, Tamagawa, T.2, Makishima, K.6 |
| المصدر: |
Physical Review Letters. 7/5/2013, Vol. 111 Issue 1, p015001-1-015001-5. 5p. |
| مصطلحات موضوعية: |
*HARDENING (Heat treatment), *GAMMA ray sources, *GAMMA ray detectors, *LIGHTNING, *THUNDERSTORMS |
| مصطلحات جغرافية: |
SEA of Japan |
| مستخلص: |
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 of the 3-10 MeV gamma rays and those >10 MeV, suggesting that the area of >10 MeV gamma-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. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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