EXPERIMENTAL AND THEORETICAL CROSS-SECTIONS FOR ELECTRON-IMPACT IONIZATION OF TI-5+

Absolute cross sections for electron-impact ionization of Ti5+ have been measured from below threshold to 1500-eV collision energies. Distorted-wave calculations including direct ionization and excitation autoionization from the 3s23p5 ground state and from the 3s23p43d excited configurations have been performed. Comparison of experiment and theory indicates that about 33% of the incident ions were in metastable configurations. Ionization rate coefficients and fitting parameters derived from the experimental results are also presented. © 1990 The American Physical Society.