首页|Thermally-assisted optically stimulated luminescence from deep electron traps in microcline
Thermally-assisted optically stimulated luminescence from deep electron traps in microcline
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NSTL
Elsevier
We report thermally-assisted optically stimulated luminescence (TA-OSL) of microcline (KAlSi3O8) from Sri Surya Pahar hill in Assam state, North-Eastern India. To study the luminescence associated with deep electron traps, a beta-irradiated sample was first heated to 500 & DEG;C at 1 oCs(-1) to deplete all electron traps accessible up to this temperature. Thereafter, the sample was illuminated by 470 nm blue-or 870 nm infrared light at various temperatures between 30 and 300? and TA-OSL associated with deep electron traps recorded. The intensity of TA-OSL increased with measurement temperature. The TA-OSL decay curves measured under both types of illumination can be described by a sum of two exponential components. Further, the TA-OSL stimulated by blue light is more intense than that corresponding to infrared light. The TA-OSL is consistent with the presence of at least two types of deep electron traps with differing values of the activation energy for thermal assistance. As regards dose response, the TA-OSL intensity increases sublinearly with dose between 100 and 1000 Gy.
NSTL
Elsevier
