High-resolution photoelectron-spectroscopic investigation of the H 2 O cation in its electronic state.

The photoelectron spectrum of water has been recorded in the vicinity of thetransition between 112000 and 116000 cm−1(13.89–14.38 eV). The high resolution allowed the observation of the rotational structure of several bands. Rotational assignments of the transitions involving the Π(080), Σ(070) and Π(060) vibronic states of theelectronic state are deduced from previous studies of theband system of H2O+and photoionisation selection rules. The transition to the Σ(030) vibronic state is tentatively assigned. [ABSTRACT FROM PUBLISHER]