PHOTOIONIZATION OF GROUND AND EXCITED-STATES OF NEON TYPE TI-XIII

The R-matrix method is used to calculate the photoionization cross-sec tion of Ti XIII from its ground and first three excited states. The re sults are obtained for photon energies ranging from the first ionizati on threshold to just above the second ionization threshold of the resi dual ion Ti XIV. Configuration interaction wavefunctions are used to d escribe the initial Ti XII and final Ti XIV states. The positions and effective quantum numbers for the Rydberg series converging to the exc ited state 2s2p6 S-2(e) of the residual ion, are predicted.