Crystal Field Splitting of Corep32Levels

Abstract

The splittings of $p_{\frac{3}{2}}$ atomic core levels due to internal electric field gradients have been calculated for the case of ${\mathrm{Tm}}^{3+}$ ions in thulium ethyl sulphate and shown to be measurable by electron spectroscopy. The splittings could be about 1 eV under favorable conditions.