A search for O nu beta beta decay of Sn-124 with tin-loaded liquid scintillator

作者：Hwang M J; Kwon Y J; Kim H J^*; Kwak J W; Kim S C; Kim S K; Kim T Y; Kim S Y; Lee H S; Lee M J; Myung S S; Kim Y D; Lee J I; Kang W G; Hahn I S; Lee M H

来源：Astroparticle Physics, 2009, 31(6): 412-416.

DOI：10.1016/j.astropartphys.2009.05.001

• Tin-loaded liquid scintillator
• Double-beta decay
• Neutrino mass
• Sn-124

A search for the neutrinoless double-beta decay of Sn-124 was carried out using the tin-loaded liquid scintillator for an active source-detector technique. Tin (32.6%) in weight was successfully loaded into the liquid scintillator, and light output was as high as 57% of the unloaded liquid scintillator. A tin-loaded liquid scintillator with 1.1 l volume was installed at the 700 m underground laboratory in YangYang. and data were taken for 5285 h. No evidence for the O nu beta beta decay was found and a lower limit on the Sn-124 half-life was obtained to be 2.0 x 10(19) year with 90% C.L The new limit represents a significant improvement with respect to those previously available for Sn-124.

• 出版日期2009-7