Study of the ground state of PO+ using photoelectron spectroscopy

Abstract

The band associated with the first ionization potential of the PO(X2Π) radical, corresponding to the process PO+(X1Σ+)â†� PO(X2Π), has been observed for the first time by vacuum ultraviolet photoelectron spectroscopy. The adiabatic first ionization potential was measured as 8.39 ± 0.01 eV and the following spectroscopic parameters were determined for the PO+(X1Σ+) state: text-decoration:overlinewe= 1410 ± 30 cm–1, re= 1.419 ± 0.005 Å, and De= 8.25 ± 0.01 eV.