Thermoluminescence and optically stimulated luminescence in various phases of doped Na₂SO₄

Abstract

The dependence of optically stimulated luminescence (OSL) and thermoluminescence (TL) response due to crystal phase in Cu and Cu,Mg-doped Na₂SO₄ was studied. Study shows that the slowly cooled samples which crystallize in phase V show good OSL sensitivity whereas the quenched samples of Na₂SO₄ which crystallize in phase III irrespective of doping show no OSL sensitivity. However, during storage when phase III samples get converted to phase V, samples show OSL sensitivity comparable to freshly prepared samples in phase V. Hence, it is observed that TL–OSL properties of doped Na₂SO₄ are phase dependent .This study will be helpful in developing OSL phosphors in which phase plays an important role in deciding the desired properties.

Keywords:

• phase transitions
• thermoluminescence
• optically stimulated luminescence
• optical properties
• radiation effects
• sodium sulphate

Disclosure statement

No potential conflict of interest was reported by the authors.