Double beta decays into excited states in Pd-110 and Pd-102

作者：Lehnert B^*; Andreotti E; Degering D; Hult M; Laubenstein M; Wester T; Zuber K

来源：Journal of Physics G: Nuclear and Particle Physics , 2016, 43(11): 115201.

DOI：10.1088/0954-3899/43/11/115201

• double beta decay
• rare event search
• gamma spectroscopy

A search for double beta decays of Pd-110 and Pd-102 into excited states of the daughter nuclides has been performed using three ultra-low background gamma-spectrometry measurements in the Felsenkeller laboratory, Germany, the HADES laboratory, Belgium and at the LNGS, Italy. The combined Bayesian analysis of the three measurements sets improved half-life limits for the 2v beta beta and 0v beta beta decay modes of the 2(1)(+), 0(1)(+) and 2(2)(+) transitions in Pd-110 to 2.9 . 10(20) yr, 4.0 . 10(20) yr and 3.0 . 10(20) yr, respectively, and in Pd-102 to 7.6 . 10(18) yr, 8.8 . 10(18) yr and 1.4 . 10(19) yr, respectively, with 90% credibility.

• 出版日期2016-11