The spectra, polarization and decay kinetics of the triplet and singlet emissions of Ga+ centers in Ga-doped crystals were studied at 0.1 to 400K. It was found that the triplet AX and AT emission bands coincided. Two slow components were observed in the decay kinetics of each emission below 1.5K, and were explained by tunnel splitting of the metastable minima of the corresponding triplet relaxed excited state. This suggested an off-center displacement of a Ga+ ion from a crystal lattice site; both in the tetragonal and in the trigonal Jahn-Teller minima.

The spectra, polarization and decay kinetics of the triplet and singlet emissions of Ga+ centers in Ga-doped crystals were studied at 0.1 to 400K. It was found that the triplet AX and AT emission bands coincided. Two slow components were observed in the decay kinetics of each emission below 1.5K, and were explained by tunnel splitting of the metastable minima of the corresponding triplet relaxed excited state. This suggested an off-center displacement of a Ga+ ion from a crystal lattice site; both in the tetragonal and in the trigonal Jahn-Teller minima.