منابع مشابه
Simple relation for alpha decay half-lives.
The experimental values of log&pT, yp(sec) plotted vs Zz /QQ are shown to fall on a nearly universal straight line with log, oT, ~z(sec)=(9. 54Z~. /1/Q ) —51.37, where Zz is the charge number of the daughter nucleus and Q is expressed in units of MeV. This behavior also numerically comes out of the semiclassical WKB calculation of the barrier penetration factor. The fine structure in the ratio ...
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 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 کامل(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 کاملExperimental detection of alpha-particles from the radioactive decay of natural bismuth.
The only naturally occurring isotope of bismuth, 209Bi, is commonly regarded as the heaviest stable isotope. But like most other heavy nuclei abundant in nature and characterized by an exceptionally long lifetime, it is metastable with respect to alpha-decay. However, the decay usually evades observation because the nuclear structure of 209Bi gives rise to an extremely low decay probability and...
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ژورنال
عنوان ژورنال: Journal of Physics G: Nuclear and Particle Physics
سال: 2005
ISSN: 0954-3899,1361-6471
DOI: 10.1088/0954-3899/31/2/005