Absorption Spectra of Rubidium Halide-Thallium Phosphors with the CsCl-Type Structure

概要

論文の詳細を見る
Absorption spectra of RbI:Tl, RbBr:Tl, RbI:Pb, and RbBr:Pb having the CsCl-type lattice structure under high pressures have been observed. At the phase transition from the NaCl-type to the CsCl-type structure, in RbI:Tl, the A band shows a discontinuous red shift and a new absorption band appears on the short wavelength side of the A band. This new absorption band does not show a character of the forbidden line such as the B band. In RbBr:Tl where the electron affinity of halogen ions is large than that in RbI:Tl, however, the A band shows a discontinuous blue shift and there does not appear any new absorption band. In the case of Pb^<++> activator ions, at the phase transition, the A band shows a discontinuous'red shift and a new absorption band appears in RbI and besides, in RbBr. These results are discussed on the basis of the possibility of the configuration interaction between the excited states of the activator ions and electron transfer states.
社団法人日本物理学会の論文
1968-12-05