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Double-beta decay of 48Ca in the TGV experiment

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Abstract

The low-background, high-sensitivity Ge multidetector spectrometer TGV is used to study the double-beta decay of 48Ca. Additional suppression of the recorded background is achieved with neutron shielding and a method for distinguishing β particles from γ rays by detector-pulse rise time. The estimates T γγ2ν1/2 = (4.2 ± 2.4) × 1019 yr and T γγ0ν1/2 > 1.5 × 1021 yr (at a 90% C.L.) for the double-beta decay of 48Ca are obtained.

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Authors and Affiliations

  1. Centre de Spectrometrie Nucléaire et de Spectrometrie de Masse, F-91405, Orsay, France

    Ch. Briançon

  2. Faculty of Nuclear Science and Physical Engineering, Czech Technical University, CZ-11519, Prague, Czech Republic

    I. Štekl

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

    V. B. Brudanin, N. I. Rukhadze, Ch. Briançon, V. G. Egorov, V. E. Kovalenko, A. Kovalik, A. V. Salamatin, V. V. Tsoupko-Sitnikov, Ts. Vylov & I. Štekl

Authors
  1. V. B. Brudanin
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  2. N. I. Rukhadze
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  3. Ch. Briançon
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  4. V. G. Egorov
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  5. V. E. Kovalenko
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  6. A. Kovalik
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  7. A. V. Salamatin
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  8. V. V. Tsoupko-Sitnikov
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  9. Ts. Vylov
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  10. I. Štekl
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Additional information

From Yadernaya Fizika, Vol. 63, No. 7, 2000, pp. 1292–1295.

Original English Text Copyright © 2000 by Brudanin, Rukhadze, Briançon, Egorov, Kovalenko, Kovalik, Salamatin, Tsoupko-Sitnikov, Vylov, Štekl.

This article was submitted by the authors in English.

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Brudanin, V.B., Rukhadze, N.I., Briançon, C. et al. Double-beta decay of 48Ca in the TGV experiment. Phys. Atom. Nuclei 63, 1218–1221 (2000). https://doi.org/10.1134/1.855772

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