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本文对Ln~(3+):LaCl_3和Ln~(3+):LaBr_3体系进行晶场能级分析,其主要目的有二:(一)对已测得的实验能级进行理论计算和归宿;(二)探讨能级间的相互作用及等价算符方法和不可约张量方法对该体系的适合程度。理论计算采用投影算符方法构成J=6,5,4,3,2,1,0的D_(3h)不可约表示基矢。在整个计算过程中,晶场矩阵由相同不可约表示的基矢构成。对~7F(J=6,5,4,3,2,1,0)本文分别应用等价算符方法(略去晶场J相互作用即略去所谓的晶场J混合作用)和不可约张量方法(考虑晶
In this paper, the crystal field level analysis of Ln ~ (3 +): LaCl_3 and Ln ~ (3 +): LaBr_3 system has two main purposes: (1) theoretical calculation and fate of the measured experimental level; (B) to explore the interaction between energy levels and the equivalence operator method and the irreducible tensor method to the degree of suitability of the system. The theoretical calculation uses the projection operator method to form D_ (3h) irreducible representation base vectors of J = 6,5,4,3,2,1,0. Throughout the calculation process, the crystal field matrix by the same irreducible representation of the base. Equivalent operator method (J = 6,5,4,3,2,1,0) is used in this paper, respectively (omitting the J field interaction that is, eliminating the so-called J field mixing) and irreducible Tensor method (consider crystal