First result for the neutrino magnetic moment from measurements with the GEMMA spectrometer |
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Authors: | A G Beda V B Brudanin E V Demidova C Vylov M G Gavrilov V G Egorov A S Starostin M V Shirchenko |
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Institution: | (1) Institute of Theoretical and Experimental Physics, Bol’shaya Cheremushkinskaya ul. 25, Moscow, 117259, Russia;(2) Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia |
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Abstract: | The first result obtained in the measurements of the neutrino magnetic moment at the Kalinin nuclear power plant with the GEMMA spectrometer is presented. A high-purity germanium detector of mass 1.5 kg placed at a distance of 13.9 m from the reactor core is used in the spectrometer. The antineutrino flux at the detector position is 2.73 × 1013 $ \bar \nu The first result obtained in the measurements of the neutrino magnetic moment at the Kalinin nuclear power plant with the
GEMMA spectrometer is presented. A high-purity germanium detector of mass 1.5 kg placed at a distance of 13.9 m from the reactor
core is used in the spectrometer. The antineutrino flux at the detector position is 2.73 × 1013
/(cm2 s). The differential method is used to select events of electromagnetic antineutrino-electron scattering. The spectra taken
in the reactor-on and reactor-off modes over 6200 and 2064 h, respectively, are compared. On the basis of a data analysis,
an upper limit of 5.8 × 10−11 μB was set on the neutrino magnetic moment μ
ν
at a 90% C.L.
Original Russian Text ? A.G. Beda, V.B. Brudanin, E.V. Demidova, C.Vylov, M.G. Gavrilov, V.G. Egorov, A.S. Starostin, M.V.
Shirchenko, 2007, published in Yadernaya Fizika, 2007, Vol. 70, No. 11, pp. 1925–1935. |
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