THE POLARIZED ABSORPTION SPECTRUM AND QUANTUM STATES OF Er3+ IN SINGLE CRYSTAL LiYFLiYF4
LiYF4晶体中Er3+的偏振吸收光谱及其量子态

High resolution polarized absorption spectra in visible and ultra-violet spectral region have been examined sysmatically. We have mainly determined the stark sublevels and their irreducible representations for the higher energy levels. We find that the groups of their absorption lines are corresponding to those of Br3+ in CaWOLiYF4 and in LaFLiYF3, but there exist sysmatically shifts between the centers of gravity of energy levels in these three different crystals.