Abstract
The magnetic circular dichroism (MCD) and absorption spectrum of the U center in KCl have been measured at liquid helium temperature. The results are consistent with the usual 1 S(l s 2) → 1 P(l s2 p) assignment with the temperature independent MCD yielding an excited state magnetic moment only about 40 per cent that calculated for a hydride ion in an octahedral crystal field.
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