Abstract

Taking the effect of the J-mixing into account in the consideration of luminescense of rare-earth ions on low symmetry positions in solids, we derive the following line strength formula for electric-diople transition from term ψ_iJ_i to term ψ_fJ_f (modified Judd’s three parameter band intensity formula¹) where ψJ is the same thing as τ^2S+1_LJ, the term label; |a(ψJ,ψ′J′)|²/(2J′+1) is defined as the j-mixing coefficient between term ψJ and term ψ′J′.

© 1984 Optical Society of America