GROUND AND EXCITED-STATES OF XE-2(+) OBSERVED BY HIGH-RESOLUTION THRESHOLD PHOTOELECTRON-SPECTROSCOPY OF XE-2

Threshold photoelectron spectra of the xenon dimer have been observed with a resolution of 2 meV in the wavelength range 920-945 Å and 1022-1112 Å using the penetrating field technique and synchrotron radiation. Threshold photoelectron bands associated with transitions to the A2 Σ1/2u+, B2 Π3/2g, C 2 Π3/2u, C2 Π1/2u, and D 2 Σ1+ states of Xe2+ have been identified. Vibrational structure associated with the C2 Π1/2u, state has been observed for the first time and a new value of the D2 Σ1/2g+ state ionization potential is reported. © 1995 American Institute of Physics.