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27 April 2024

» arxiv » 1005.2736

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Upper limit on the neutrino magnetic moment from three years of data from the GEMMA spectrometer
A. G. Beda ; V. B. Brudanin ; V. G. Egorov ; D. V. Medvedev ; V. S. Pogosov ; M. V. Shirchenko ; A. S. Starostin ;
Date:	16 May 2010
Abstract:	The result of the 3-year neutrino magnetic moment measurement at the Kalinin Nuclear Power Plant with the GEMMA spectrometer is presented. Antineutrino-electron scattering is investigated. A HPGe detector of 1.5 kg placed at a distance of 13.9 m from the 3 GW_th reactor core is used in the spectrometer. The antineutrino flux is 2.7x10^13 1/cm^2/s. The differential method is used to extract nu-e electromagnetic scattering events. The scattered electron spectra taken in 5184+6798 and 1853+1021 hours for the reactor ON and OFF periods are compared. The upper limits at 90% CL for the neutrino magnetic moment with and without atomic ionization mechanism were found to be 5.0x10^-12 and 3.2x10^-11 Bohr magnetons, respectively.
Source:	arXiv, 1005.2736
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