Single crystals of CsI, CsI:Tl, and CsI:Tl, Bi were grown by the vertical Bridgman method. We studied the effect of Bi3+ codoping on the CsI:Tl X-ray-induced afterglow. Thermally stimulated luminescence measurements were carried out in order to investigate the role of traps. The results showed a remarkable reduction of afterglow, of about an order of magnitude, and of trap concentration by Bi codoping. These improvements could be related to a possible role of Bi in the compensation of intrinsic nonstoichiometry defects. (c) 2012 The Japan Society of Applied Physics
Totsuka, D., Yanagida, T., Fujimoto, Y., Yokota, Y., Moretti, F., Vedda, A., et al. (2012). Afterglow Suppression by Codoping with Bi in CsI:Tl Crystal Scintillator. APPLIED PHYSICS EXPRESS, 5(5) [10.1143/APEX.5.052601].
Afterglow Suppression by Codoping with Bi in CsI:Tl Crystal Scintillator
MORETTI, FEDERICO;VEDDA, ANNA GRAZIELLA;
2012
Abstract
Single crystals of CsI, CsI:Tl, and CsI:Tl, Bi were grown by the vertical Bridgman method. We studied the effect of Bi3+ codoping on the CsI:Tl X-ray-induced afterglow. Thermally stimulated luminescence measurements were carried out in order to investigate the role of traps. The results showed a remarkable reduction of afterglow, of about an order of magnitude, and of trap concentration by Bi codoping. These improvements could be related to a possible role of Bi in the compensation of intrinsic nonstoichiometry defects. (c) 2012 The Japan Society of Applied Physics
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