Electronic spectra of Yb3+ in elpasolite lattices
作者： Peter A. Tanner
DOI: 10.1080/00268978600101181
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摘要: Intense luminescence due to the 2 F 5/2→2 7/2 transition, near 1μm, is observed when elpasolites Cs2NaHoCl6 and Cs2NaNdCl6 are doped with Yb3+ excited by 488 nm or 514 argon ion laser radiation respectively. The mechanism of energy transfer has been studied for Cs2NaHoCl6: YbCl3- 6 using temperature, concentration kinetic studies, involves a cross-relaxation from 5 5(HoCl3- 6). liquid-helium-temperature spectra interpreted, together absorption spectrum Cs2NaYbCi6 all f 13 levels assigned. agreement latest crystal field calculations poor. A comparison made excitation Cs2NaHoBr6: YbBr3- 6. No at site octahedral symmetry in Yb3+-doped Cs2NaTmCl6 Cs2NaErCl6. In former case closest level about eight phonons above 5/2 so that not appreciably populated, latter 4 I 11/2(ErCl3- 6) lev...
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