Analysis of the absorption spectra and spectral hole burning in zero-phonon lines of F_3~+ and N_1 colour centres in LiF crystals

摘要

The temperature dependences and mechanisms of broadening of zero-phonon lines of F_3~+ (488 nm) and N_1 (523 nm) colour centres in LiF crystals are investigated. The results obtained make it possible to determine the quadratic electronic-vibrational coupling constant for N _1 colour centres. The experimental data on the spectral hole burning in zero-phonon lines of F_3~+ and N_1 colour centres indicate that the latter are positively charged.