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arXiv · 1409.2734

Search for double beta decay of $^{136}$Ce and $^{138}$Ce with HPGe gamma detector

P. Belli·R. Bernabei·R. S. Boiko·F. Cappella·R. Cerulli·F. A. Danevich·A. Incicchitti·B. N. Kropivyansky·M. Laubenstein·D. V. Poda·O. G. Polischuk·V. I. Tretyak
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Abstract

Search for double $β$ decay of $^{136}$Ce and $^{138}$Ce was realized with 732 g of deeply purified cerium oxide sample measured over 1900 h with the help of an ultra-low background HPGe $γ$ detector with a volume of 465 cm$^3$ at the STELLA facility of the Gran Sasso National Laboratories of the INFN (Italy). New improved half-life limits on double beta processes in the cerium isotopes were set at the level of $\lim T_{1/2}\sim 10^{17}-10^{18}$~yr; many of them are even two orders of magnitude larger than the best previous results.

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P. Belli, R. Bernabei, R. S. Boiko, F. Cappella, R. Cerulli, F. A. Danevich, A. Incicchitti, B. N. Kropivyansky, M. Laubenstein, D. V. Poda, O. G. Polischuk, V. I. Tretyak. 2014-09-09. Search for double beta decay of $^{136}$Ce and $^{138}$Ce with HPGe gamma detector. https://doi.org/10.1016/j.nuclphysa.2014.08.072

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