Reduced 4f-5d electrostatic interaction of Tm2+ in SrCl2

1 December 1973

journal article
research article
Published by AIP Publishing in The Journal of Chemical Physics

Vol. 59 (11) , 5837-5841
https://doi.org/10.1063/1.1679951

Abstract

The visible absorption and emission spectra of Tm²⁺ in SrCl₂ sharpen at low temperatures and exhibit marked vibronic structure. The 4f¹² ³H₆ 5de_g excited states account for these transitions. The splitting of these states is almost entirely due to the 4f‐5d electrostatic interaction. For theory and experiment to agree, the free‐ion electrostatic interaction must be multiplied by 0.6. This suggests a strong nephelauxetic (cloud‐expanding) effect for the 5d electron on the divalent lathanides.

Keywords

EXCITED STATES

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