Abstract

We performed two-color resonance ionization spectroscopy for studying highly excited states of titanium. We obtained high-resolution spectra of the Rydberg and autoionization series using three intermediate states. To observe the appropriate series, we considered mixed configurations of the intermediate states. The convergence limits of the observed series depended on the intermediate states. Using the Rydberg formula and convergence limit estimation, we could provide a tentative assignment to almost all the fine structure levels in the obtained spectra. From the analyses of the two regions, we derived the ionization potential of titanium as 55072.5±0.1cm1.

© 2007 Optical Society of America

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