Systematics of Evaluated Half-Lives of Double-Beta Decay

A new evaluation of 2$\beta$-decay half lives and their systematics is presented. These data extend the previous evaluation and include the analysis of all recent measurements. The nuclear matrix elements for 2$\beta$-decay transitions in 12 nuclei have been extracted. The recommended values are compared with the large-scale shell-model, QRPA calculations, and experimental data. A T$^{2\nu}_{1/2 }$ $\sim$ 1/E$^{8}$ systematic trend has been observed for recommended $^{128,130}$Te values. This trend indicates similarities for nuclear matrix elements in Te nuclei and was predicted for 2$\beta$(2$\nu$)-decay mode. The complete list of results is available online at http://www.nndc.bnl.gov/bbdecay/.