No abstract

Photoionization of the CO molecule and inner-valence states of CO" between 22 and 45 eV have been studied by means of photoelectron spectroscopy using both synchrotron radiation and He ii radiation. Vibrational structure has been resolved in many bands up to 45 eV. CASSCF (complete active space self-consistent field) and MRCI (multireference configuration interaction) calculations of potential curves in the 22-30 eV range have been perfonned and these have been used to predict vibrational levels and Franck-Condon factors. In this energy range three valence states, D 'IT, 3'E' and 3% have been identified, and spectroscopic constants have been determined for the first two of these. Above 30 eV, all valence slates have been found to be repulsive. In addition to the broad bands expxted for these slates, several progressions of narrow lines are observed most probably reflecting transitions to Rydberg states.P Bultzer et a1 a1 (1994). At higher energies, above approximately 20 eV, the number of states increases quickly due to significant many-electron effects and this leads to a breakdown of the independent-particle molecular orbital approximation. The 3u-' hole state is split into a manifold of ' Z ' stales (Okuda and

No abstract

No abstract

No abstract