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Search for double-β decays of tin isotopes with enhanced sensitivity

J.V. Dawson 1 D. Degering M. Köhler R. Ramaswamy 2 C. Reeve 2 J. R. Wilson 2 K. Zuber 2
1 APC - Neutrinos
LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies, APC (UMR_7164) - AstroParticule et Cosmologie
Abstract : A search for the various double beta decay modes of 124Sn and 112Sn has been performed on 75 kg.days of data. New half-life limits for excited states in 124Sn have been obtained including a lower limit for the decay into the first excited 2+ state of 124Te of T_half > 0.87e20 yrs (90% CL) and into the first excited 0+ state of T_half > 1.08e20 yrs (90% CL). Ground state and excited state transitions of 112Sn have also been experimentally explored. A limit for the 2 neutrino double electron capture of T_half > 1.8e19 yrs (90% CL) is obtained. The non-observation of de-excitation gammas from the 0+ at 1888.5keV results in a lower half-life limit on the 0 neutrino double electron capture decay of 112Sn of T_half > 0.8e19 yrs (90% CL), despite a possible resonant enhancement of the decay rate due to degenerated states.
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Submitted on : Tuesday, October 14, 2008 - 11:26:23 AM
Last modification on : Friday, November 6, 2020 - 3:48:11 PM

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J.V. Dawson, D. Degering, M. Köhler, R. Ramaswamy, C. Reeve, et al.. Search for double-β decays of tin isotopes with enhanced sensitivity. Physical Review C, American Physical Society, 2008, 78, pp.035503. ⟨10.1103/PhysRevC.78.035503⟩. ⟨in2p3-00330369⟩

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