The dosimetric characteristics of Li2B4O7 prepared in-house and doped with Cu are studied using the thermoluminescence (TL) technique. The temperature at which the TL is observed to be most intense is at 178°C. The pre-irradiation annealing condition is 300°C for 10 min while the corresponding value of the post-irradiation annealing is 300°C for 30 min. Furthermore, this study indicated that this material has low fading and wide linear dose response (10−3–103 Gy).