Published By: Blue Eyes Intelligence Engineering

Abstract — Doped Bi4Ge3O12 (BGO) crystals possessing optical properties such as stimulated luminescence are largely exploited at present for many practical applications. We have conducted detailed studies on the thermally stimulated luminescence of some doped single crystals of BGO. Vanadium-doped (BGO:V) and ruthenium-doped (BGO:Ru) crystals have been grown in the Institute of Solid State Physics at the Bulgarian Academy of Sciences. The crystals have been irradiated with UV light from XBO lamp. Glow curves from BGO:V and BGO: Ru have been acquired using a precise thermoluminescence reader designed in the Laboratory for Nuclear physics and radioecology at the University of Shumen. A computerized glow curve deconvolution method has been exploited to obtain trap parameters of the two crystals. Fading of the peaks for the two types of crystals has been studied for time periods as large as 20 days. No significant time-dependence in peak positions and other trap parameters have been observed so far. Applications of the crystals for beta- and gamma- dosimetric applications have been reviewed