1. The 71Ga(3He, t) reaction and the low-energy neutrino response
- Author
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Pavel P. Povinec, Kichiji Hatanaka, T. Adachi, A. Okamoto, Fedor Šimkovic, G. Susoy, H. Okamura, R. G. T. Zegers, Hisanori Fujita, H. C. Kozer, B. A. Brown, M. Fujiwara, J. Van de Walle, P. Puppe, R. Hodak, J. H. Thies, Hidetoshi Akimune, M. Holl, Mohsen Harakeh, Takayoshi Suzuki, H. Ejiri, A. Lennarz, N. T. Khai, C. Iwamoto, V. N. Gavrin, Y. Fujita, E. Ganioglu, D. Frekers, E.-W. Grewe, Atsushi Tamii, B. Bilgier, Carol Guess, and B.T. Cleveland
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Physics::Instrumentation and Detectors ,010308 nuclear & particles physics ,Electron capture ,Solar neutrino ,01 natural sciences ,7. Clean energy ,Nuclear physics ,Neutrino detector ,Excited state ,0103 physical sciences ,GALLEX ,Neutrino ,010306 general physics ,Ground state ,Charged current - Abstract
A 71Ga(3He, t)71Ge charge-exchange experiment was performed to extract with high precision the Gamow–Teller (GT) transition strengths to the three lowest-lying states in 71Ge, i.e., the ground state ( 1 / 2 − ) , the 175 keV ( 5 / 2 − ) and the 500 keV ( 3 / 2 − ) excited states. These are the relevant states, which are populated via a charged-current reaction induced by neutrinos from reactor-produced 51Cr and 37Ar sources. A precise measurement of the GT transition strengths is an important input into the calibration of the SAGE and GALLEX solar neutrino detectors and addresses a long-standing discrepancy between the measured and evaluated capture rates from the 51Cr and 37Ar neutrino calibration sources, which has recently spawned new ideas about unconventional neutrino properties.
- Published
- 2011
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