Several fluorescence line groups in the infrared, visible, and ultraviolet regions are observed by exciting YAG:Nd3+crystal with Ar+laser (5145 Aring;) and xhyphen;ray at liquid nitrogen temperature (LNT) and room temperature (RT), respectively. All of these line groups are assigned properly. Some new Stark levels are determined from the fluorescence spectra. The excited state absorption process is observed.
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