Up-conversion in elpasolite crystals doped with U3+

被引：13

作者：

Deren, PJ

Strek, W

Zych, E

Drozdzynski, J

机构：

[1] Polish Acad Sci, W Trzebiatowski Inst Low Temp & Struct Res, PL-50950 Wroclaw 2, Poland

[2] Univ Wroclaw, Inst Chem, PL-50383 Wroclaw, Poland

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 332卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(00)01249-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two elpasolite crystals Cs2NaYBr6 and Cs2NaYCl6, both doped with U3+ were investigated. The emission from the (4)G(7/2), F-4(3/2), and I-4(11/2) levels was found. Decay times of the visible emission were measured as a function of temperature. The strong influence of temperature on the decay times is discussed in terms of strong phonon coupling of the 5f(3) and the 5f(2)6d(1) bands. Upon IR excitation a red emission, assigned to the 4G(7/2) --> I-4(9/2) transition, was observed only in the bromide. The anti-Stokes emission is due to step by step absorption. The observed dependence of these phenomena on environment is discussed briefly. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：308 / 312

页数：5

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