LiYF4:Nd3+的发光

首次研究了LiYF4:Nd3+由Ar+激光5145Å激发的发光(Laser excited photo-luminescence,LEPL)以及由X射线激发的发光(X-Ray excited photo luminescence,XEPL).仔细地研究了它的荧光谱的偏振特性.

LUMINESCENCE OF LiYF4:Nd3+

The LEPL (Laser excited photo luminescence) spectra of LiYF4:Nd3+, excited by 5145Å emission of an Ar+ Laser, and its XEPL (X-ray excited photo-Luminescence) spectra were bcth studied for the first time. Based on the energy values of the stark levels at corresponding temperatures and referred to their polarization properties, the fluorescence lines were designated (derived from table 1 and table 2). The results are listed in table 3 and table 4.From this work, the foljowing conclusion can be made.(1) Both of LEPL and XEPL in LiYF4:Nd3+ have been studied for the first time,especially.the short wavelength f lucres cence have been observed.(2) The polarization characteristics of LiYF4:Nd3+ fluorescence emission have been studied, and magnetic dipole transitions hava been observed in the system.(3) A new strong fluorescence line (A3→Y3) close to R2→Z1 fluorescence peak has been found in LiYF4:Nd3+.(4) It can be seen from table 3 and table 4, that many fluorescence peaks belong to ax type of spectra. Some Γ5,6T7,8 transitions occur only in particular polarization(σorπ spectrum).For example, the peak 15064cm-1(π, E1(7,8)→X3(5,6)) in table 3 and the peak 26103cm-1(σ,M1(5,6)→Y1(7,8)) in table 4 are these cases. This is the feature of the transitions between kramer doublets.