Isotopic Composition of Terrestrial Atmospheric Xenon and the Chain Reaction of Fission
作者:
Yu. A. Shukolyukov,
A. P. Meshick,
期刊:
Isotopenpraxis Isotopes in Environmental and Health Studies
(Taylor Available online 1990)
卷期:
Volume 26,
issue 8
页码: 364-370
ISSN:0021-1915
年代: 1990
DOI:10.1080/10256019008624334
出版商: Taylor & Francis Group
关键词: earth atmosphere;fission fragments;geologic history;heating;isotope ratio;natural nuclear reactors;oklo phenomenon;radionuclide migration;xenon isotopes;xenon 131;xenon 132
数据来源: Taylor
摘要:
From the comparison of terrestrial atmospheric Xe with the primordial Xe (solar, AVCC), a strange component with a fine structure at132Xe and131Xe have been found. It was shown that the isotopic composition of this component can be explained neither by mass fractionation of primordial Xe, nor by an admixture of fission products of known nuclei. An analogous Xe was extracted at a low temperature from substances of the natural nuclear reactor, fine-grain samples from Colorado type deposits, ordinary pitchblendes and samples from the epicenter of a A-bomb explosion. It was proved that the strange Xe is a result of different migration rates of β-radioactive Xe precursors which are fission fragments. It is quite possible that the strange component of atmospheric Xe originated as a result of global neutron-induced fission processes during early stages of geological history of the Earth.
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