Abstract

We have made a new assignment of spectrum of CdCl₂:Mn⁺⁺ which had been published by B.Ghosh et.al.⁽¹⁾. The main points which are different from theirs are as following: 1). There have been some evidences of ¹⁾3d distortion in this spectrum. 2). The six peaks between 26660 cm^-1 and 27390 cm^-1 have been assigned as phonon sideband which is based on the D_3d and spin-orbit splitting of ⁴T₁ (D). Because of Cd⁺⁺ and Cl^- have no magnetic momentums and the concentration of Mn⁺⁺ is very low. They should not look as exciton-magneton-phonon sideband. 3). The sharp peaks at 23670 cm^-1 and 23360 cm^-1 have been regard as a result of No-phonon magnetic transition ⁶A₁→⁴E(G) and ⁶A₁→⁴A₁ (G) (⁴E-⁴A₁ degeneration is removed by HD_3d). Because of the diagonal martrix elements of H_SL in ⁴E(G) equal zero, the previous assignment in which both of them have been due to ⁴E(G) is unlike to us. Moreover, the peak at 23980 cm^-1 has been indentified as One-phonon sideband of the transition ⁶A₁→⁶A₁ (G)⁽²⁾. 4) . The electrical dipole transition ought to be assisted by phonons for the parity conservation. In oar fitting computation the phonon spectra of CdCl₂ and MnCl₂ have been consulted ⁽³⁾⁽⁴⁾ and included.

© 1984 Optical Society of America