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Status of an experiment aimed at laboratory searches for the electron-antineutrino magnetic moment at a level of μ ν ≤3±10− μ B

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Abstract

An experiment aimed at directly detecting antineutrino-electron scattering by using a 40-MCi tritium β-active source will make it possible to lower the present-day laboratory limit on the neutrino magnetic moment by two orders of magnitude. The experiment brings together novel unique technologies in studying rare processes of neutrino-electron scattering: (i) an artificial source of antineutrinos from tritium decay of 40-MCi activity with the antineutrino flux density of about 6×1014 cm−2 s−1 and (ii) new types of detectors capable of detecting electrons of energy down to about 10 eV, namely, a silicon cryogenic detector based on the ionization-into-heat conversion effect and a high-pure germanium detector with an internal signal amplification in the electric field. A compact installation located at a specially equipped underground laboratory (≤100 mwe) will provide favorable background conditions for running the experiment. With a background level of about 0.1 event/(kg keV d) and detector assembly masses of 3 and 5 kg for the silicon and germanium ones, respectively, a limit of μ ν ≤3±10− μ B on the electron-antineutrino magnetic moment will be obtained within 1 to 2 years of data acquisition. The status of the experiment and the state of the art are presented.

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Authors and Affiliations

  1. Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia

    B. S. Neganov & V. N. Trofimov

  2. Russian Federal Nuclear Center, All-Russia Scientific Research Institute of Experimental Physics, Sarov, Russia

    A. A. Yukhimchuk

  3. Institute for Theoretical and Experimental Physics, Bol’shaya Cheremushkinskaya ul. 25, Moscow, 117259, Russia

    B. S. Neganov, V. N. Trofimov, A. A. Yukhimchuk, L. N. Bogdanova, A. G. Beda & A. S. Starostin

Authors
  1. B. S. Neganov
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  2. V. N. Trofimov
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  3. A. A. Yukhimchuk
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  4. L. N. Bogdanova
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  5. A. G. Beda
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  6. A. S. Starostin
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Additional information

From Yadernaya Fizika, Vol. 64, No. 11, 2001, pp. 2033–2039.

Original English Text Copyright © 2001 by Neganov, Trofimov, Yukhimchuk, Bogdanova, Beda, Starostin.

This article was submitted by the authors in English.

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Neganov, B.S., Trofimov, V.N., Yukhimchuk, A.A. et al. Status of an experiment aimed at laboratory searches for the electron-antineutrino magnetic moment at a level of μ ν ≤3±10− μ B . Phys. Atom. Nuclei 64, 1948–1954 (2001). https://doi.org/10.1134/1.1423744

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  • DOI: https://doi.org/10.1134/1.1423744

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