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

Abstract

a b s t r a c tAn 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 $ 10 17 -10 18 years for β þ EC and EC-EC processes in 112 Sn and $ 10 18 years for β À β À 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.

Contributed Review: The saga of neutrinoless double beta decay search with TeO2 thermal detectors

“…Table II summarizes the main features of the chain of bolometric experiments presented in this work. 15 The series of significant improvements appears here evident. Passing from the 6 g crystal to CUORE, the detector mass has increased of more than a factor 10 5 .…”

“…of "commonly" studied isotopes includes [14,15]: 48 Ca, 76 Ge, 82 Se, 96 Zr, 100 Mo, 116 Cd, 124 Sn, 130 Te, 136 Xe and 150 Nd. Among these, 130 Te presents important advantages (Table I) and it is therefore a very favorable choice.…”

Contextual Isotope Ranking Criteria for Peak Identification in Gamma Spectroscopy Using a Large Database

“…It is often the case that the spectrum data is only available in image format and ranks E, F and J have the advantage of performing ranking without the raw data of the spectrum. To show this capability, a calibrated spectrum in which isotopes were identified and marked with tags ( figure 2 of [51]) was analyzed using ranks F and J. The peak maxima and Full Width at Half Maximum reported (FWHM) were used to construct an info file [35] with 17 query ranges.…”

Double Beta Decay to Excited States of Daughter Nuclei

“…In particular, the measurements on 100 Mo and 150 Nd in GeMulti have already been discussed in Section 3 and 4, respectively. Campaigns of measurements were performed on a quite large number of elements containing isotopes candidates for ββ decay: samarium ( 144 Sm, 154 Sm) [76], ytterbium ( 168 Yb, 176 Yb) [78], erbium ( 162 Er, 170 Er) [77], cerium ( 136 Ce) [86,117,118], ruthenium ( 96 Ru, 104 Ru) [55,119], osmium ( 184 Os, 192 Os) [81], platinum ( 190 Pt, 198 Pt) [82], dysprosium ( 156 Dy, 158 Dy) [87], cadmium ( 106 Cd) [120], and tin ( 112 Sn, 124 Sn) [121].…”