Abstract
Raman experiments were carried out on KI, X-irradiated over a range of temperatures for which V-centres are created. After X-irradiation at 190K, a Raman band was observed at 112 cm-1, attributable to the 'symmetric' stretching vibration of an I3- molecular ion and responsible for the 335 nm absorption band. The Raman spectrum of KI X-irradiated at room temperature is composed of two sharp lines at 180 and 189 cm-1 as in molecular I2 crystals, which is in agreement with the formation of large iodine aggregates.
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