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Excited‐state electronic Raman scattering of alexandrite
Author(s) -
Hui Wang,
LiRen Lou,
ChaoShu Shi
Publication year - 1990
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250210712
Subject(s) - raman spectroscopy , excited state , raman scattering , excitation , metastability , ion , x ray raman scattering , chemistry , atomic physics , point reflection , molecular physics , materials science , physics , condensed matter physics , optics , organic chemistry , quantum mechanics
Raman scattering is used to investigate the electronic excited‐states of alexandrite at low temperature (13 K). The Raman spectra of Cr 3+ ions in two non‐equivalent types of crystal field sites, one having mirror symmetry C s the other having inversion symmetry C 1 , are reported. With λ e = 514.5 nm excitation, the Raman transitions of the metastable state 2 A ′ (R m1 ) → 2 A ″(R m2 ) and 2 A ′(R m1 ) → 2 A ″( 2 T 1 ) of Cr 3+ in the C s site are 36 cm −1 and 600 cm −1 , respectively; with λ e = 488.0 nm excitation, the Raman transition between 2 A g (R 11 ) and 2 A g (R 12 ) of Cr 3+ in the C 1 site is 116 cm −1 .