Calculations of inner-shell excitations in Ca⁺

We have used ab initio configuration-interaction methods to calculate inner-shell excitations in Ca + and used the resulting calculations to study the 3p-hole photoionization spectrum of Ca + in the photon energy range 25-40 eV. We have identified almost all the peaks in the experimental spectrum of Lyon et al . We also compare our findings with the autoionization spectrum following electron-impact excitation reported by Pejcev et al and the photoionization spectrum obtained by Gottwald et al .