Duan Chang-Kui, Tanner Peter A, Meijerink Andries, Babin Vladimir
Institute of Modern Physics, Chongqing University of Post and Telecommunications, Chongqing 400065, People's Republic of China. Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, People's Republic of China.
J Phys Condens Matter. 2009 Sep 30;21(39):395501. doi: 10.1088/0953-8984/21/39/395501. Epub 2009 Sep 1.
Emission and excitation spectra of Cs(2)NaLnCl(6) (Ln = Y, Eu, Gd, Er, Yb), Cs(2)NaYCl(6):Ce and Cs(2)NaYCl(6):Tm have been recorded using synchrotron radiation. With the possible exception of the case for Ce(3+), no [Formula: see text] transitions are observed and the emission spectra are entirely assigned to [Formula: see text] intraconfigurational transitions of Ln(3+) in LnCl(6)(3-) and impurity species. The excitation spectra comprise intraconfigurational, charge transfer and band-to-band transitions. Trace impurities of oxy-species or of other lanthanide ions have a profound effect upon the spectra. The 4f-5d absorption spectra have been simulated by employing the suite of programs of Professor M F Reid and the results have been included together with the experimental spectra.
利用同步辐射记录了Cs₂NaLnCl₆（Ln = Y、Eu、Gd、Er、Yb）、Cs₂NaYCl₆:Ce和Cs₂NaYCl₆:Tm的发射光谱和激发光谱。除Ce(3+)的情况可能例外，未观察到[公式：见正文]跃迁，发射光谱完全归属于LnCl₆³⁻中Ln(3+)的[公式：见正文]组态内跃迁以及杂质物种。激发光谱包括组态内、电荷转移和带间跃迁。氧物种或其他镧系离子的痕量杂质对光谱有深远影响。通过使用M F Reid教授的程序套件模拟了4f - 5d吸收光谱，并将结果与实验光谱一起呈现。
