منابع مشابه
(recommended) Half-life Values for Two Neutrino Double Beta Decay
All existing ”positive” results on two neutrino double beta decay in different nuclei were analyzed. Using procedure recommended by Particle Data Group weighted average values for half-lives of Ca, Ge, Se, Zr, Mo, Mo Ru (0+1 ), Cd, Nd and U were obtained. Existing geochemical data were analyzed and recommended values for half-lives of Te and Te are proposed. We recommend to use these results as...
متن کاملThe Half-life of 130Te Double ^-decay
In order to determine the half-life of the 130Te double /?-decay, the amounts and isotopic composition of xenon extracted from tellurium ores, from the Oya gold mine in Japan, have been measured with a high-sensitivity mass spectrometer. Compared with atmospheric xenon an excess was definitely found at mass numbers 129, 130 and 131 in the extracted xenon. The excess of 130Xe is predominant, the...
متن کاملAverage and recommended half-life values for two neutrino double beta decay: upgrade-09
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 48Ca, 76Ge, 82Se, 96Zr, 100Mo, 100Mo 100Ru (01 ), 116Cd, 130Te, 150Nd, 150Nd 150Sm (01 ) and 238U were obtained. Existing geochemical data were analyzed and recommended values for half-lives of ...
متن کاملMeasurement of the beta decay half-life of 17B.
The properties of nuclei far from stability provide a stringent test of the validity of shell model Hamiltonians derived from data for nuclei near the valley of stability. Failure of shell model calculations to extrapolate to nuclei far from stability may indicate a breakdown of symmetries assumed in the model. Such a breakdown may provide evidence for new regions of deformation as were found f...
متن کاملDouble beta decay
Double beta decay is a rare nuclear process changing the nuclear charge by two units leaving atomic number unchanged. The detection of the neutrino accompanied mode (A,Z)?(A,Z+2)+2e+ 2n e: with half-lives around 10 20 years is among the rarest decays ever observed. Of outmost importance for particle physics and especially neutrino physics, is the neutrinoless mode (A,Z)?(A,Z+2)+2e. This process...
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ژورنال
عنوان ژورنال: Physical Review
سال: 1950
ISSN: 0031-899X
DOI: 10.1103/physrev.77.296