Effective-Hamiltonian parameters for \emph{ab initio} energy-level calculations of SrCl${}_2$:Yb${}^{2+}$ and CsCaBr${}_3$:Yb${}^{2+}$

A. J. Salkeld, M. F. Reid, J. -P. R. Wells +3

Calculated energy levels from recent \emph{ab initio} studies of the electronic structure of SrCl${}_2$:Yb${}^{2+}$ and CsCaBr${}_3$:Yb${}^{2+}$ are fitted with a semi-empirical "cryst…