Sequential two-photon excitation via repulsive intermediate states

Femtosecond velocity map imaging of dissociative ionization dynamics in CF3IPresented at the Stereodynamics 2000 Conference on Dynamics and Stereodynamics of Chemical Reactions, El Escorial, Madrid, December 1–5, 2000.

“…Al-Kahali et al 40 reported sequential two-photon excitation via a repulsive intermediate state to an ion pair in I 2 using a one-color two-photon excitation, and employed a two-color REMPI scheme via a bound-free-bound route to an ion pair in Cl 2 . 41 Subsequently, Min et al 42 extended this technique to polyatomics in a study of the 6s( 2 E 1=2 ) Rydberg state in CH 3 I and CD 3 I using two-color sequential bound-free-bound excitation.…”

Mass-resolved multiphoton ionization spectroscopy of jet-cooled Cl2. I. Bound-free-bound spectroscopy

“…The present work parallels a previous study in which an equivalent one-color E←B←X two-photon excitation spectrum of I 2 involving bond stretching was reported. 1 The G1 g ( 3 P 1 )←C←X pathway is not available because the red extremum of the G→C emission lies at 260 nm, 10 i.e., there is little or no overlap with the C←X absorption.…”

“…[1][2][3][4] Some degree of bond stretching is involved and appreciable intensity is observed when both pump and probe steps have large transition dipole moments. In addition, the wavelength of the probe photon ͑ probe ͒ must lie to shorter wavelengths than the red extremum of the final to intermediate state emission system.…”