Average and recommended half-life values for two-neutrino double beta decay

作者：Barabash A S^*

来源：Nuclear Physics A, 2015, 935: 52-64.

DOI：10.1016/j.nuclphysa.2015.01.001

• Double beta decay
• Nuclear matrix elements
• Ca-48
• Ge-76
• Se-82
• Zr-96.
• Mo-100
• Mo-100-Ru-100 (0(1)(+))
• Cd-116
• Te-128
• Te-130
• Xe-136
• Nd-150
• Nd-150-Sm-150 (0(1)(+))
• U-238
• Ba-130

All existing positive results on two-neutrino double beta decay in different nuclei were analyzed. Using the procedure recommended by the Particle Data Group, weighted average values for half-lives of Ca-48, Ge-76, Se-82, Zr-96, Mo-100, Mo-100-Ru-100 (0(1)(+))Te-,Te- 130, Xe-136, Nd-150, 150Nd-Sm-150 (0(1)(+)) and U-238 were obtained. Existing geochemical data were analyzed and recommended values for half-lives of Te-128 and Ba-130 are proposed. Given the measured half-life values, nuclear matrix elements were calculated using latest (more reliable and precise) values for phase space factor. Finally, previous results (PRC 81 (2010) 035501) were updated and results for Xe-136 were added.

• 出版日期2015-3