Geochemical Measurements of Double-Beta Decay
A review of recent geochemical measurements on the double-beta decay of 82Se, 128Te and 130Te suggests that the current 'best' value for the decay rate of 128Te relative to that of 130Te is 4*10-4 and the current 'best' values for individual half-lives are as follows: 1*1020 y for 82Se, 2*1024 y for 128Te, and 8*1020 y for 130Te.
O. Manuel, "Geochemical Measurements of Double-Beta Decay," Journal of Physics G: Nuclear and Particle Physics, vol. 17, pp. S221-S229, Institute of Physics - IOP Publishing, Dec 1991.
The definitive version is available at http://dx.doi.org/10.1088/0954-3899/17/S/024
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