Xenon Isotopes in Tellurobismuthite, Boliden, Sweden
The isotopic composition of xenon is reported in four different samples of tellurobismuthite, Boliden, Sweden, of varying tellurium content. It is observed that excess 129Xe, 130Xe and 131Xe, vary proportionately to the tellurium content of the sample. From the excess 130Xe measurement, the half-life for double beta decay of 130Te is calculated to be 2·51 × 1021 yr. From the observed excess of 128Xe in the most tellurium rich sample, the half-life for the double beta decay of 128Te is estimated to be greater than 2·7 × 1023 yr. It is shown that solar neutrino induced reactions on 128Te and 130Te do not contribute significantly to the observed excesses of 128Xe and 130Xe. The isotopic composition of xenon in a pyrite sample from the Boliden mine and in two samples of the cesium-rich mineral, pollucite, are used to examine previous hypotheses for the origin of excess 129Xe and 131Xe in tellurium ores. It is shown that these two xenon isotopes are produced in situ by nuclear reactions on tellurium.
B. Srinivasan et al., "Xenon Isotopes in Tellurobismuthite, Boliden, Sweden," Journal of Inorganic and Nuclear Chemistry, vol. 34, pp. 2381-2396, Pergamon Press Ltd., Aug 1972.
The definitive version is available at http://dx.doi.org/10.1016/0022-1902(72)80183-0
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