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 degrees C and 360 degrees C can be observed among the TL glow curves while the EPR spectra exhibit two signals: the A signal with g perpendicular = 2.0038 and g parallel = 2.0024 due to the SO3- 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 degrees C TL peak is associated to the A signal and thus to the SO3- centre and the 360 degrees C TL peak is caused by mechanical treatment corresponding to the B EPR signal.
Baïetto
V
V
Université M. de Montaigne-Bordeaux III/CNRS, Centre de Recherche en Physique Appliquée à l'Archéologie, Talence, France. crpaa@montaigne.u-bordeaux.fr
Villeneuve
G
G
Guibert
P
P
Schvoerer
M
M
D002119:Calcium Carbonate / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods; D006115:Greece; D008163:Luminescent Measurements; D011208:Powders
D011208:Powders; D002119:Calcium Carbonate