Alpha-recoil damage: Relation to isotopic disequilibrium and leaching of radionuclides

Details Alpha-recoil damage: Relation to isotopic disequilibrium and leaching of radionuclides Alpha-recoil damage: Relation to isotopic disequilibrium and leaching of radionuclides

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52.1459f&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 52, Issue 6, pp.1459-1466

Physics

2

Scientific paper

The observation by et al. (1973) of large differences between the solubilities of isotopically different plutonium dioxides, has led to the recognition of preferential etching of recoil damage as a widespread phenomenon for alpha-active radionuclides. The associated preferential solubility of the products of alpha decay, along with direct recoil ejection, are the two specific microscopic mechanisms that are documented as causes of isotopic disequilibrium in the U and Th decay series. Similarly, leaching plays a significant role in releasing 222 Rn from natural substances, 222 Rn being the alpha-decay product of 226 Ra. The average annealing time in nature of the damage sites can be inferred from the extent of isotopic disequilibrium for different isotopic pairs in the Th and U decay chains.

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