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Effect of Colour Centres on the Cr 3+ Spectrum in Ruby
Author(s) -
Arkhangelskii G. E.,
Morgenshtern Z. L.,
Neustruev V. B.
Publication year - 1969
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.19690360206
Subject(s) - spectrum (functional analysis) , physics , quantum mechanics
It is found that the colour centres in ruby cause an increase of the oscillator strength in the transitions corresponding to the R‐ and B‐lines of the Cr 3+ absorption and a decrease of the relaxation time τ of the luminescence in the R‐lines. These effects can be explained by a partial forbiddenness violation for the transitions 4 A 2 → 2 E and 4 A 2 → 2 T 2 induced by the change in the intercrystalline field due to the charged colour centres (by Cr 2+ and Cr 4+ ions). From the broadening of the ESR lines the effective field due to the colour centres is estimated.