ABSORPTION AND LUMINESCENCE OF COLOUR CENTRES IN KCI AND NaCI
نویسنده
چکیده
Crystals of KCI and NaCl, coloured additively and quenched from high temperature to liquid-nitrogen temperature, show the F-absorption band and when irradiated in this band an emission in the infrared. If kept for a short time at room temperature a new absorption band (M-band) develops and irradiation in this band gives rise to a new emission band. If an M-absorption band is present, this new emission band is also found when the crystal is irradiated in the F-band. An explanation for this is offered. After longer periods of ageing also R-bands develop; irradiation in the R-bands as well as in the F-band gives rise to a third emission band.
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تاریخ انتشار 2014