EPR and TL correlation in some powdered Greek white marbles

Thermoluminescence of white powdered marble samples, chosen to display different EPR spectra, were studied. Two peaks at 280°C and 360°C can be observed among the TL glow curves while the EPR spectra exhibit two signals: the A signal with gperpendicular=2.0038 and gshort parallel =2.0024 due to the SO−3 centre and the B one with g1=2.0005; g2=2.0001; g3=1.9998 due to mechanical powder reduction (drilling). Owing to heating and simultaneous experiments, a correlation have been established: the 280°C TL peak is associated to the A signal and thus to the SO−3 centre and the 360°C TL peak is caused by mechanical treatment corresponding to the B EPR signal.