Gd_2O_2S：Eu荧光谱及能级的高压研究  

HIGH PRESSURE INVESTIGATION OF FLUORESCENCE EPECTRA AND AEVELS FOR Gd_2O_PS

作　　者：池元斌[1] 王立中[1] 刘慎薪[1] 王秋平[1] 

机构地区：[1]吉林大学原子与分子物理所,中国科学院长春物理所,哈尔滨师范大学物理系

出　　处：《高压物理学报》1994年第2期87-98,共12页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金

摘　　要：在２１５００～１１５００ｃｍ￣（－１）光谱区间内测量了Ｇｄ＿２Ｏ＿２Ｓ：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Ｅｕ￣（３＋）离子￣５Ｄ＿（０～２）及￣７Ｆ＿（０～６）的３９个斯塔克能级中的３５个能级。在０～１５ＧＰａ压力范围内，研究了Ｇｄ＿２Ｏ＿２Ｓ：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，￣５Ｄ＿２、￣７Ｆ＿（２～５）多重态的斯塔克劈裂变大，而￣５Ｄ＿１和￣７Ｆ＿１的劈裂变小。The fluorescence spectrum of Eu￣(3+) doped in Gd_2_O_2S has been in vestigated in thespectral region 21500～11500 cm￣(-1) at 77K and 300K. The 122 spectral lines measured at 77Kand 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 upto 15GPa. It was found that all the lines observed change to longer wavelength and their intensi-ties decrease with increasing pressure. The six levels of ￣5D_(0～2) descent more rapidly than tbe levelsof ￣7F_J. The stark splittings of ￣5D_2 and ￣7F_(2～5) multiplets increase,but the splittings of ￣5D_1 and ￣7F_1multiplets decrease under pressure.

关 键 词：发光粉 荧光谱 能级 高压 铕离子 

分 类 号：O482.31[理学—固体物理]