STUDY OF LOW-LYING RYDBERG STATES IN $O_{2}$ BY ELECTRON-IMPACT SPECTROSCOPY

Loading...
Thumbnail Image

Date

1972

Journal Title

Journal ISSN

Volume Title

Publisher

Ohio State University

Research Projects

Organizational Units

Journal Issue

Abstract

There has been considerable work done on the photo-absorption spectrum of $O_{2}$ in the 6 to 12 eV region but only very few of the Rydberg states in that region have been identified. The energy-loss region from 6 to 10.5 eV has been studied as a function of incident energy and of scattering angle. The angle and energy dependence observed for the various features in the energy-loss spectra were correlated with the known behavior for transitions of certain symmetry and with the results of improved-virtual-orbital calculations. This analysis has resulted in the identification of the low-lying $(^{1}\Pi_{g} \rightarrow 3_{SC_{g}}) ^{3}{\Pi}_{g}$ Rydberg state. The lowest four vibrational levels were observed superposed on the top of the maximum intensity portion of the Schumann-Runge continuum and the state was located at $T_{00} = 8.13 {\pm} 0.02 $eV. The analysis has also resulted in the following tentative identifications for Rydberg states excited from the $^{1}{\Pi}_{g}$ MO: $^{1}{\Sigma}^{-}_{u} at ~ 9.76 \ $eV, $^{3}{\Sigma}^{+}_{u}$ at 9.94 eV, and the ``longest band’’ at 9.97 eV as a $^{3}{\Sigma}^{-}_{u}$.

Description

Author Institution: Aerospace Corporation; California Institute of Technology; Jet Propulsion Laboratory Pasadena

Keywords

Citation