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The zero-phonon lines on R_2, R~+, N_1 and R′_2 centers and some new narrow lines have been observed in bivalent-metal-doped and air-grown LiF crystals irradiated by γ-ray in the temperature range of 9.5—130K. The spectral properties and thermostabilities of the lines are investigated systematically at different temperatures.
The zero-phonon lines on R_2, R ~ +, N_1 and R’_2 centers and some new narrow lines have been observed in bivalent-metal-doped and air-grown LiFium irradiated by γ-ray in the temperature range of 9.5- 130K. The spectral properties and thermostabilities of the lines are been systematically at different temperatures.