Raman scattering induced by V-centre aggregates in pure and Ca-doped KI X-irradiated at room temperature
- 10 September 1981
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 14 (25) , L767-L771
- https://doi.org/10.1088/0022-3719/14/25/005
Abstract
The formation of anion defects created under X and gamma -irradiation at room temperature in pure KI and Ca-doped KI has been studied by optical absorption and Raman scattering techniques. In pure crystals only large iodine clusters with the structure of crystalline iodine are formed, whereas in Ca-doped crystals three stages can be distinguished in the formation of iodine defects as the X-ray dose increases. Experiments show the role played by the divalent cation in the process of stabilisation of the polyiodide centres (I3-, I5-), which are the precursors of the formation of larger iodine aggregates.Keywords
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