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Experimental investigation of geologically produced antineutrinos with KamLAND

Araki, T. and Mauger, C. and McKeown, R. D. and Vogel, P. and Piquemal, F. (2005) Experimental investigation of geologically produced antineutrinos with KamLAND. Nature, 436 (7050). pp. 499-503. ISSN 0028-0836. https://resolver.caltech.edu/CaltechAUTHORS:20150326-081041693

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Abstract

The detection of electron antineutrinos produced by natural radioactivity in the Earth could yield important geophysical information. The Kamioka liquid scintillator antineutrino detector (KamLAND) has the sensitivity to detect electron antineutrinos produced by the decay of ^(238)U and ^(232)Th within the Earth. Earth composition models suggest that the radiogenic power from these isotope decays is 16 TW, approximately half of the total measured heat dissipation rate from the Earth. Here we present results from a search for geoneutrinos with KamLAND. Assuming a Th/U mass concentration ratio of 3.9, the 90 per cent confidence interval for the total number of geoneutrinos detected is 4.5 to 54.2. This result is consistent with the central value of 19 predicted by geophysical models. Although our present data have limited statistical power, they nevertheless provide by direct means an upper limit (60 TW) for the radiogenic power of U and Th in the Earth, a quantity that is currently poorly constrained.


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http://dx.doi.org/10.1038/nature03980DOIArticle
http://www.nature.com/nature/journal/v436/n7050/full/nature03980.htmlUNSPECIFIEDArticle
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Additional Information:© 2005 Nature Publishing Group. Received 25 May 2005; Accepted 4 July 2005. We thank E. Ohtani and N. Sleep for advice and guidance. The KamLAND experiment is supported by the COE program of the Japanese Ministry of Education, Culture, Sports, Science, and Technology, and by the United States Department of Energy. The reactor data were provided courtesy of the following associations in Japan: Hokkaido, Tohoku, Tokyo, Hokuriku, Chubu, Kansai, Chugoku, Shikoku and Kyushu Electric Power Companies, Japan Atomic Power Co. and Japan Nuclear Cycle Development Institute. Kamioka Mining and Smelting Company provided services for activity at the experimental site.
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Funding AgencyGrant Number
Ministry of Education, Culture, Sports, Science and Technology (MEXT)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Issue or Number:7050
Record Number:CaltechAUTHORS:20150326-081041693
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150326-081041693
Official Citation:Experimental investigation of geologically produced antineutrinos with KamLAND p499 T. Araki, S. Enomoto, K. Furuno, Y. Gando, K. Ichimura, H. Ikeda, K. Inoue, Y. Kishimoto, M. Koga, Y. Koseki, T. Maeda, T. Mitsui, M. Motoki, K. Nakajima, H. Ogawa, M. Ogawa, K. Owada, J.-S. Ricol, I. Shimizu, J. Shirai, F. Suekane, A. Suzuki, K. Tada, S. Takeuchi, K. Tamae, Y. Tsuda, H. Watanabe, J. Busenitz, T. Classen, Z. Djurcic, G. Keefer, D. Leonard, A. Piepke, E. Yakushev, B. E. Berger, Y. D. Chan, M. P. Decowski, D. A. Dwyer, S. J. Freedman, B. K. Fujikawa, J. Goldman, F. Gray, K. M. Heeger, L. Hsu, K. T. Lesko, K.-B. Luk, H. Murayama, T. O'Donnell, A. W. P. Poon, H. M. Steiner, L. A. Winslow, C. Mauger, R. D. McKeown, P. Vogel, C. E. Lane, T. Miletic, G. Guillian, J. G. Learned, J. Maricic, S. Matsuno, S. Pakvasa, G. A. Horton-Smith, S. Dazeley, S. Hatakeyama, A. Rojas, R. Svoboda, B. D. Dieterle, J. Detwiler, G. Gratta, K. Ishii, N. Tolich, Y. Uchida, M. Batygov, W. Bugg, Y. Efremenko, Y. Kamyshkov, A. Kozlov, Y. Nakamura, H. J. Karwowski, D. M. Markoff, K. Nakamura, R. M. Rohm, W. Tornow, R. Wendell, M.-J. Chen, Y.-F. Wang & F. Piquemal doi:10.1038/nature03980
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ID Code:56101
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:27 Mar 2015 01:25
Last Modified:03 Oct 2019 08:11

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