Computer Science
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..88..330h&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 88, no. 3-4, May 1988, p. 330-336.
Computer Science
2
Nuclear Reactions, Nuclides, Rare Earth Elements, Thermal Neutrons, Uranium Compounds, Uranium Isotopes, Abundance, Fluence, Mineral Deposits
Scientific paper
Isotopic ratios and abundances of all REE in two Oklo ore samples are measured and a method for estimating the neutron fluence, the conversion factor of uranium and the average neutron energy (or temperature) based on Gd and U isotopic ratios is presented. The calculations are used to evaluate parameters for the natural nuclear reactors at Oklo. The neutron fluence values evaluated using Gd isotopes are compared to those evaluated using Sm and Nd isotopes, showing that the agreement of fluence values found becomes better as fluence increases. A relationship between the abundances of fissiogenic nuclides of La, Ce, Nd, Sm and Gd and their mass numbers is also presented.
Hidaka Hiroshi
Masuda Akimasa
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