Detection of high-energy gamma rays from winter thunderclouds.
نویسندگان
چکیده
A report is made on a comprehensive observation of a burstlike gamma-ray emission from thunderclouds on the Sea of Japan, during strong thunderstorms on 6 January 2007. The detected emission, lasting for approximately 40 sec, preceded cloud-to-ground lightning discharges. The burst spectrum, extending to 10 MeV, can be interpreted as consisting of bremsstrahlung photons originating from relativistic electrons. This ground-based observation provides the first clear evidence that strong electric fields in thunderclouds can continuously accelerate electrons beyond 10 MeV prior to lightning discharges.
منابع مشابه
Observations of high energy gamma-rays from winter thunderclouds
T. Enoto, H. Tsuchiya, T. Yuasa, S. Yamada, H. Kato, M. Kawaharada, T. Kitaguchi, M. Kokubun, M. Okano, S. Nakamura, K. Nakazawa and K. Makishima Department of Physics, University of Tokyo, Tokyo 113-0033, Japan Cosmic Radiation Laboratory, Riken, Saitama 351-0198, Japan Department of High Energy Astrophysics, Institute of Space and Astronautical Science, JAXA, Kanagawa 229-8501, Japan Departme...
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عنوان ژورنال:
- Physical review letters
دوره 99 16 شماره
صفحات -
تاریخ انتشار 2007