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Searching for the β+EC and EC/EC Decays of 74Se

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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

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Abstract

Double beta decay (β+EC, EC/EC) of 74Se was investigated at the Modane underground laboratory (LSM, France; 4800 m of water equivalent) using the OBELIX ultralow-background HPGe detector with a sensitive volume of 600 cm3 and a sample of natural selenium with a mass of 1.6 kg containing ~0.89% (~14.24 g) of 74Se. The new experimental limits for β+EC and EC/EC decays of 74Se to ground 0+ and excited \(2_{1}^{ + },\) 596 keV, and \(2_{2}^{ + },\) 1204 keV states of 74Ge, were obtained from experimental data accumulated over 135 days.

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ACKNOWLEDGMENTS

We thank the personnel of LSM for their technical support and assistance in making our measurements.

Funding

This work was performed under the terms of the LEA−JOULE agreement and Agreement no. 15-93 on Cooperation between the Institut National de Physique Nucléaire et de Physique des Particules (France) and the Joint Institute for Nuclear Research (Russia). It was supported in part by the Czech Republic, grants LM2018107 and ERDF project no. EF16_019/0000766; and by the Russian Foundation for Basic Research, project no. 20-52-16201.

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Authors and Affiliations

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

    N. I. Rukhadze, V. B. Brudanin, A. A. Klimenko, A. V. Rakhimov & Yu. A. Shitov

  2. National Research Center “Kurchatov Institute, 117218, Moscow, Russia

    A. S. Barabash, S. I. Konovalov & V. I. Umatov

  3. Institute of Experimental and Applied Physics, Czech Technical University, 11000, Prague, Czech Republic

    E. N. Rukhadze & I. Stekl

  4. Modane Underground Laboratory, Grenoble Alpes University, 73500, Modane, France

    G. Warot

Authors
  1. N. I. Rukhadze
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  2. A. S. Barabash
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  3. V. B. Brudanin
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  4. A. A. Klimenko
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  5. S. I. Konovalov
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  6. A. V. Rakhimov
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  7. E. N. Rukhadze
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  8. Yu. A. Shitov
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  9. I. Stekl
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  10. V. I. Umatov
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  11. G. Warot
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Corresponding author

Correspondence to N. I. Rukhadze.

Additional information

Translated by E. Baldina

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Rukhadze, N.I., Barabash, A.S., Brudanin, V.B. et al. Searching for the β+EC and EC/EC Decays of 74Se. Bull. Russ. Acad. Sci. Phys. 84, 974–978 (2020). https://doi.org/10.3103/S1062873820080250

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  • DOI: https://doi.org/10.3103/S1062873820080250

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