Âderna Fìzika ta Energetika (Jun 2011)

First results of the experiment to search for 2β decay of 106Cd with the help of 106CdWO4 crystal scintillators

  • P. Bell,
  • R. Bernabei,
  • R. S. Boiko,
  • V. B. Brudanin,
  • F. Cappella,
  • V. Caracciolo,
  • R. Cerulli,
  • D. M. Chernyak,
  • F. A. Danevich ,
  • S. d'Angelo,
  • A. E. Dossovitskiy,
  • E. N. Galashov,
  • A. Incicchitti,
  • V. V. Kobychev,
  • S. S. Nagorny,
  • F. Nozzoli,
  • B. N. Kropivyansky,
  • V. M. Kudovbenko,
  • A. L. Mikhlin,
  • A. S. Nikolaiko,
  • D. V. Poda,
  • O. G. Polischuk,
  • D. Prosperi,
  • V. N. Shlegel,
  • Yu. G. Stenin,
  • J. Suhonen,
  • V. I. Tretyak,
  • Ya. V. Vasiliev,
  • R. B. Podviyanuk

Journal volume & issue
Vol. 12, no. 2
pp. 124 – 128

Abstract

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An experiment to search for 2β processes in 106Cd with the help of 106CdWO4 crystal scintillator (mass of 215 g), enriched in 106Cd up to 66 %, is in progress at the Gran Sasso National Laboratories of the INFN (Italy). After 1320 h of data taking, limits on double beta processes in 106Cd have been established on the level of 1019 − 1020 yr, in particular (all the results at 90 % C.L.): T1/2(0ν2ε) > 3.6 · 1020 yr, T1/2(2νεβ+) > 7.2 · 1019 yr, and T1/2(2ν2β+) > 2.5 · 1020 yr. Resonant 0ν2ε processes have been restricted as T1/2(0ν2K) > 1.4 · 1020 yr and T1/2(0νLK) > 3.2 · 1020 yr. A possible resonant enhancement of the 0ν2ε processes is estimated in the framework of the QRPA approach.

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