Two Kinds of Deep Hole-Traps in Bi₄Ge₃O₁₂ Crystal

This paper presents the thermoluminescence (TL) and the absorption spectra of a series of doped Bi₄Ge₃O₁₂(BGO) crystal irradiated by ultraviolet light. By the representation of Fe : BGO and Mn : BGO, the formation mechanism of two kinds of deep TL traps was discussed, and also their association with the stability of color center.