Spectroscopic studies of γ-rayed CaF2:Sr

► Effect of Sr doping CaF2 on optical absorption and photoluminescence are explained. ► Various types of defects present are identified and interpreted. ► Variation of optical absorption and PL intensities with increase in γ-dose are accounted. ► Results of optical absorption and photoluminescence of Sr doped CaF2 are compared with undoped CaF2.