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Observation of thundercloud-related gamma rays and neutrons in Tibet

Tsuchiya, H. and Hibino, K. and Kawata, K. and Hotta, N. and Tateyama, N. and Ohnishi, M. and Takita, M. and Chen, D. and Huang, J. and Miyasaka, M. and Kondo, I. and Takahashi, E. and Shimoda, S. and Yamada, Y. and Lu, H. and Zhang, J. L. and Yu, X. X. and Tan, Y. H. and Nie, S. M. and Munakata, K. and Enoto, T. and Makishima, K. (2012) Observation of thundercloud-related gamma rays and neutrons in Tibet. Physical Review D, 85 (9). 092006. ISSN 2470-0010. https://resolver.caltech.edu/CaltechAUTHORS:20120605-123432521

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Abstract

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 ∼40  min, was observed on July 22, 2010. The solar-neutron telescope detected significant γ-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 γ 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevD.85.092006DOIUNSPECIFIED
http://link.aps.org/doi/10.1103/PhysRevD.85.092006PublisherUNSPECIFIED
Additional Information:© 2012 American Physical Society. Received 1 July 2011; published 10 May 2012. The study is supported in part by a Grant-in-Aid for Scientific Research (C), No. 20540298, and a Grantin- Aid for Young Scientists (B), No. 19740167. This study is also supported in part by the Special Postdoctoral Research Project for Basic Science in RIKEN, the Special Research Project for Basic Science in RIKEN ("Investigation of Spontaneously Evolving Systems").
Funders:
Funding AgencyGrant Number
Grant-in-Aid for Scientific Research20540298
Grant-in- Aid for Young Scientists19740167
RIKEN Special Postdoctoral Research Project for Basic ScienceUNSPECIFIED
Issue or Number:9
Classification Code:PACS: 92.60.Pw, 52.38.Ph, 82.33.Xj, 93.30.Db
Record Number:CaltechAUTHORS:20120605-123432521
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120605-123432521
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31819
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:05 Jun 2012 22:59
Last Modified:03 Oct 2019 03:55

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