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Absorption and Magnetic Circular Dichroism Spectra of CsI:Tl +3
Author(s) -
Stillman M. J.,
Jacobs P. W. M.,
Gan K. Oyama,
Simkin D. J.
Publication year - 1984
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221240128
Subject(s) - magnetic circular dichroism , absorption (acoustics) , spectral line , ion , absorption spectroscopy , chemistry , absorption edge , atomic physics , liquid helium , impurity , magnetic moment , x ray magnetic circular dichroism , molecular physics , analytical chemistry (journal) , materials science , helium , condensed matter physics , optics , physics , band gap , organic chemistry , chromatography , astronomy , optoelectronics , composite material
The temperature dependence of the optical absorption and magnetic circular dichroism (MCD) of CsI crystals doped with Tl + is measured between liquid helium temperature and room temperature. The absorption spectra are more complicated than usual for impurity ions with the s 2 ground‐state configuration and show five strong bands on the long‐wavelength side of the absorption edge. Three of these bands are assigned to internal transitions of the Tl + ion and the other two to charge‐transfer transitions. The first and second moments of the first two absorption bands, as well as the first and third moments of thecorresponding MCD bands, are determined from spectra measured below 140 K. For these bands at higher temperatures and for the remaining bands strong overlapping precludes a meaningfull determination of the higher moments. Coupling constants and g ‐values are obtained from the moments, and the origin of the spectral bands is discussed.