ROTATIONALLY RESOLVED PHOTOELECTRON SPECTROSCOPY OF AUTOIONIZING STATES OF WATER

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1998

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Ohio State University

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We have studied the dynamics of vibrational autoionization of Rydberg states of water using energy-dispersive photoelectron spectroscopy. A high-resolution magnetic bottle photoelectron spectrometer was used to acquire rotationally resolved photoelectron spectra following vibrational autoionization of fully quantum-state selected Rydberg states with $n=6$ and $n\sim 9$. The Rydberg states were excited through a $(2+1^{\prime})$ REMPI process through selected rovibrational levels of the $\tilde{C}(1,0,0)$ state. The photoelectron spectra provide considerable dynamical information on the mechanisms of energy and angular momentum transfer between the Rydberg electron and the ion core, and also give information which will be valuable for firm identifications for the Rydberg state transitions. The spectra directly display the degree of 1-mixing between different partial waves.

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$^{a}$ W.L. Glab was partially supported by the Robert A. Welch Foundation $^{b}$ S.T. Pratt was supported by the U.S. Department of Energy, Office of Energy Research, Office of Basic Energy Sciences, under Contract W-31-109-Eng-38
Author Institution: Department of Physics, Texas Tech University; Argonne National Laboratory, Argonne

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