The accurate experimental determination of half-lives for 2-decay could be used to adjust parameters of the QRPA model, the strength of the particle-particle interaction g pp and to improve the calculation of Nuclear Matrix Element for 0 (neutrinoless) decay and neutrino mass m estimations. Presently high precision direct counting experiments are difficult due to low decay rates of tellurium and barium isotopes, but their daughter nuclei accumulating in geological samples for millions of years, are clearly observable in xenon isotopes, which have extremely low background in terrestrial rocks. This work reviews current status of the previously determined half-lives of 130 Te and 128 Te and presents new estimates of half-life of 130 Ba weak decay. Our new estimates take into account the spallogenic production of 130 Xe, significantly reducing the disagreement between the only two published values of 130 Ba half-lives. Based on this result and on our early experiments we propose a new class of geological samples, which can provide an even more accurate determination of the 130 Ba half-life.
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