Optical-Absorption Spectrum of GdCl3·6H2O

Abstract

An analysis is performed on the spectroscopic properties of the levels ${}_{}{}^6{}_{}{}^{}P_{\frac{5}{2}}^{}{}_{}{}^{}$ and ${}_{}{}^6{}_{}{}^{}P_{\frac{7}{2}}^{}{}_{}{}^{}$ of ${\mathrm{Gd}}^{3+}4f^7$ in Gd${\mathrm{Cl}}_3$ · 6${\mathrm{H}}_2$O. It is supposed that the crystal field can be represented by a cylindrically symmetric part on which a small distortion is superposed. Very good agreement is obtained for the Zeeman splittings of the components of the levels. The crystal splittings are discussed, as well as the intensities of the magnetic-dipole transitions from the ground level ${}_{}{}^8{}_{}{}^{}S_{\frac{7}{2}}^{}{}_{}{}^{}$ to the ${}_{}{}^6{}_{}{}^{}P$ multiplet.