Observation of thundercloud-related gamma rays and neutrons in Tibet

被引：88

作者：

Tsuchiya, H. ^{[1
]}

Hibino, K. ^{[2
]}

Kawata, K. ^{[3
]}

Hotta, N. ^{[5
]}

Tateyama, N. ^{[2
]}

Ohnishi, M. ^{[3
]}

Takita, M. ^{[3
]}

Chen, D. ^{[4
]}

Huang, J. ^{[6
]}

Miyasaka, M. ^{[7
]}

Kondo, I. ^{[1
]}

Takahashi, E. ^{[1
]}

Shimoda, S. ^{[1
]}

Yamada, Y. ^{[1
]}

Lu, H. ^{[6
]}

Zhang, J. L. ^{[6
]}

Yu, X. X. ^{[6
]}

Tan, Y. H. ^{[6
]}

Nie, S. M. ^{[8
]}

Munakata, K. ^{[9
]}

Enoto, T. ^{[1
,10
,11
]}

Makishima, K. ^{[12
]}

机构：

[1] RIKEN, High Energy Astrophys Lab, Wako, Saitama 3510198, Japan

[2] Kanagawa Univ, Fac Engn, Yokohama, Kanagawa 2218686, Japan

[3] Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan

[4] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

[5] Utsunomiya Univ, Fac Educ, Utsunomiya, Tochigi 3218505, Japan

[6] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China

[7] CALTECH, Pasadena, CA 91125 USA

[8] Guizhou Univ Nationalities, Guiyang 550025, Peoples R China

[9] Shinshu Univ, Dept Phys, Matsumoto, Nagano 3908621, Japan

[10] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA

[11] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA

[12] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW D | 2012年 / 85卷 / 09期

关键词：

DETECTION EFFICIENCY; RUNAWAY BREAKDOWN; ELECTRIC-FIELDS; X-RAYS; MONITOR; GENERATION;

D O I：

10.1103/PhysRevD.85.092006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

During the 2010 rainy season in Yangbajing (4300 m above sea level) in Tibet, China, a long-duration count enhancement associated with thunderclouds was detected by a solar-neutron telescope and neutron monitors installed at the Yangbajing Comic Ray Observatory. The event, lasting for similar to 40 min, was observed on July 22, 2010. The solar-neutron telescope detected significant gamma-ray signals with energies >40 MeV in the event. Such a prolonged high-energy event has never been observed in association with thunderclouds, clearly suggesting that electron acceleration lasts for 40 min in thunderclouds. In addition, Monte Carlo simulations showed that >10 MeV gamma rays largely contribute to the neutron monitor signals, while >1 keV neutrons produced via a photonuclear reaction contribute relatively less to the signals. This result suggests that enhancements of neutron monitors during thunderstorms are not necessarily clear evidence for neutron production, as previously thought.

引用

页数：14

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