Resonance enhanced multiphoton ionisation (REMPI) and REMPI-photoelectron spectroscopy of carbonyl sulphide and carbon disulphide

Rotationally resolved photoionization dynamics of hot CO fragmented from OCS

“…As the fragments separate, a strong torque is exerted on the CO fragments, leading to rotationally hot CO. Several photodissociation studies of OCS have been carried out by probing the photofragment product channels, either by laser-induced fluorescence, 2,3 by ion imaging combined with (2ϩ1) REMPI, 4 -7 or by REMPI in combination with photoelectron spectroscopy. [8][9][10] The CO rotational distribution shows a bimodal structure, 2-5,8 -10 with maxima at NЉϭ50 and NЉϭ63. This bimodal distribution is mainly due to two different processes on the 2 1 AЈ ( 1 ⌬) surface, namely direct dissociation and surface crossing to the ground state.…”

Laser photoelectron spectroscopy: spectroscopy and dynamics of excited states in small and medium‐sized molecules

“…This suggests some resonance enhancement at 62,780 cm-' by a lower lying origin possessing one quantum of vibrational excitation, notably the symmetric stretch. The level responsible is most likely the V I = 1 level of the [211s3,2]4pou (3rI,) state at 62,720cm-' [48,50]. The assignments of the two remaining PE spectra of Figure 42 are less obvious.…”

“…A convincing demonstration of what can be achieved with kinetic energy resolved ion detection will be illustrated in Section V.F, for CS2 [48,50]. X'E:.…”

“…These molecules have all been studied extensively with laser PES and our knowledge about their excited states has been amplified considerably [48][49][50]2031. Compared to diatomics the multiphoton excitation spectra of these species tend to exhibit much more extensive vibronic structure, and the associated assignment problems are usually far from trivial.…”

“…This process is of some relevance to atmospheric chemistry. In Section V.E, we shall treat a similar dissociation process in OCS as an example [49,50].…”