Ultra-low gamma-ray measurement system for neutrinoless double beta decay

作者：Kang W G^*; Choi J H; Jeon E J; Lee J I; Kim H J; Kim S K; Kim Y D; Lee J H; Ma K J; Myung S S; So J H

来源：Applied Radiation and Isotopes, 2013, 81: 290-293.

DOI：10.1016/j.apradiso.2013.03.057

• Neutrinoless double beta decay
• 0 nu beta(+)/EC
• Mo-92

An experiment for the detection of 0 nu beta(+)/EC and 0 nu EC/EC in 92Mo nuclei has been carried out with a scintillating crystal, CaMoO4, in coincidence with the HPGe detector. We study the background events inside the event selection window for 0 nu B+/EC decays of CaMoO4 detector. For 51.2 days of data taking period, we didn%26apos;t observe any event in the neutrinoless EC/EC decay event The Mo-92 0 nu beta(+)/EC decay half-life limit was set to 0.61 x 10(20) years with a 90% confidence by method of Feldman and Cousins. This ultra-low gamma ray measurement utilizing coincidence technique can be used for the resonant EC/EC decay process of some nuclei which is potentially important for neutrinoless double beta decay process.

• 出版日期2013-11