Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Aftereffects of Nuclear Decay in 57CoCl2·nH2O (n=2 and 6) Investigated by γ-X Ray Coincidence Mössbauer Spectroscopy
Takayuki KobayashiJean M. Friedt
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1986 Volume 59 Issue 2 Pages 631-634


The anomalous states produced by electron capture decay of 57Co in CoCl2·2H2O and CoCl2·6H2O are investigated using conventional Mössbauer emission spectroscopy and a γ-X ray coincidence method which allows to isolate events with a reduced influence of the Auger electron self-irradiation. The formation of the anomalous electronic and structural configuration is assigned to the self-radiolysis of the water ligands. The mechanism involves both the nearest and the next nearest H2O coordination shell according to the densities of these ligand molecules in the respective shells.

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