Zero-kinetic-energy electron spectroscopy of the predissociating A2 Sigma + state of HBr+

Abstract

The rotationally resolved zero-kinetic-energy electron spectra for the ${\mathit{v}}^{+}$=1, 2, and 3 vibrational levels of the predissociating ${\mathit{A}}^{2}$${\mathrm{\ensuremath{\Sigma}}}^{+}$ state of ${\mathrm{HBr}}^{+}$ are reported. The results for the rapidly predissociating ${\mathit{v}}^{+}$=2 and 3 levels show that the high principal quantum number Rydberg states involved in the zero-kinetic-energy spectroscopy are unperturbed by ion core fragmentation. These data demonstrate the general applicability of this technique for rotationally resolved photoelectron spectroscopy.