Author/Authors :
Milan، نويسنده , , J.B. and Buma، نويسنده , , W.J. and de Lange، نويسنده , , C.A. and Western، نويسنده , , C.M. and Ashfold، نويسنده , , M.N.R.، نويسنده ,
Abstract :
A (2 + 1) resonance enhanced multiphoton ionization photoelectron spectroscopy (REMPI-PES) study of the hitherto unobserved [a 1Δ]5pπ 2Φ Rydberg state of the SH (SD) radical is reported. Despite the fact that this state has an excitation energy which exceeds the lowest ionization energy, ionization is observed to occur preferentially by the absorption of a third photon after the two-photon excitation step, rather than through autoionization. Photoelectron spectra show a large asymmetry in the rotational branching ratios, which is attributed to the high value of Λ+ in the ionic state.
