A Novel Method Capable of Resolving Rotational Ionic States by the Detection of Threshold Photoelectrons with a Resolution of 1.2 cm-1

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Abstract
A novel method for the unambiguous direct determination of ionization potentials is presented. This is done by combining a pulsed field technique with a steradiancy analyser for the detection of threshold electrons. For now a resolution of better than 0.15 meV is demonstrated by resolving the first three rotational states of NO+.