Gd2O2S:Eu荧光谱及能级的高压研究

 在21 500~11 500 cm^-1光谱区间内测量了Gd₂O₂S:Eu的荧光光谱，测量是在室温和液氮条件下进行的，对122条低温谱线和96条常温谱线进行了指认。识别了Eu³⁺离子⁵D_0~2及⁷F_0~6的39个斯塔克能级中的35个能级。在0~15 GPa压力范围内，研究了Gd₂O₂S:Eu高压下的发射光谱。在压力作用下，发现所有观测到的谱线都红移，强度降低。6个⁵D_0~2能级下降速度大于⁷F_J，⁵D₂、⁷F_2~5多重态的斯塔克劈裂变大，而⁵D₁和⁷F₁的劈裂变小。

HIGH PRESSURE INVESTIGATION OF FLUORESCENCE EPECTRA AND AEVELS FOR Gd_2O_PS

The fluorescence spectrum of Eu³⁺ doped in Gd₂O₂S has been investigated in the spectral region 21 500～11 500 cm^-1 at 77 K and 300 K. The 122 spectral lines measured at 77 K and the 96 lines at 300K have been assigned. Thirty five of the thirty nine Stark levels of ⁵D_0~2, ⁷F_0~6 multiplets were identified. The emission spectra were also measured under high pressures up to 15 GPa. It was found that all the lines observed change to longer wavelength and their intensities decrease with increasing pressure. The six levels of ⁵D_0~2 descent more rapidly than the levels of ⁷F_J. The stark splittings of ⁵D₂ and ⁷F_2~5 multiplets increase, but the splittings of ⁵D₁ and ⁷F₁ multiplets decrease under pressure.