Preliminary study of feasibility of an experiment looking for excited state double beta transitions in tin

Abstract

An attempt to study the feasibility of a new experiment to search for double beta decay in ${}^{112}$Sn and ${}^{124}$Sn was carried out by using ultra-low background HPGe detector (244 cm${}^3$) inside the Gran Sasso National Laboratory (LNGS) of the INFN (Italy). A small sample of natural Sn was examined for 2367.5 h. The radioactive contamination of the sample has been estimated. The data has also been considered to calculate the present sensitivity for the proposed search; half-life limits $\sim$ $10^{17}-10^{18}$ years for ${\beta }^{+}$EC and EC-EC processes in ${}^{112}$Sn and $\sim$ $10^{18}$ years for ${\beta }^{-}{\beta }^{-}$ transition in ${}^{124}$Sn were measured. In the last section of the paper the enhancement of the sensitivity for a proposed experiment with larger mass to reach theoretically estimated values of half-lives is discussed.

20 pages, 11 figures, 4 tables, accepted for publication in NIMA (in press)

References in corpus (9)

• Phase space factors for double-$\beta$ decay
• Limit on Neutrinoless ββ Decay of Xe-136 from the First Phase of KamLAND-Zen and Comparison with the Positive Claim in Ge-76
• The GERDA experiment for the search of 0νββ decay in ^{76}Ge
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• Search for ${\beta }^{+}$EC and ECEC processes in ${}^{112}$Sn and ${\beta }^{-}{\beta }^{-}$ decay of ${}^{124}$Sn to the excited states of ${}^{124}$Te
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• A search for double beta decays of tin isotopes with enhanced sensitivity
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