In this paper we discuss the results of thermoluminescence (TL) studies carried out on freshly quenched crystals of KBr doped with ∼50ppm of Eu2+ions which were X-irradiated at room temperature. The TL glow curve of this phosphor material consists of three glow peaks at 355, 376 and 398K whose intensities increased as a function of X-irradiation time. The TL glow peaks were analyzed by the total curve-fitting method in order to obtain the characteristic parameters; activation energy, pre-exponential factor and kinetic order. The spectral character of the emission recorded during thermoluminescence was found to be the same for all glow peaks and consists of a broad band centered at -420 nm. This band is composed of two overlapping bands peaking at 419 and 460 nm. The former band is due to the well known fluorescence of Eu2+ions corresponding to the transition 4f65d (T2g) →8S7/2, while the latter may be associated with the recombination of F-centers with the radiation induced interstitial chlorine atoms which are thermally released from traps. It is proposed that the model of the TL process most consistent with our experimental results is one in which the Eu2+impurity acts as an electron trap during the irradiation process and that the radiation induced center (partner of an F center) and the Vkcenter (partner of an Eu+ion) are trapped together in the form of a Cl−3molecular ion at the Eu2+-cation vacancy dipoles and their smaller aggregate complexes such as dimers, trimers, etc. During the TL run, the H and Vkcenters escape from the trap and recombine with the complementary center giving rise to the observed TL emission spectra. The dosimetric characteristics of the KBr:Eu2+phosphor material are also reported.