Near threshold photofragmentation dynamics of ICl–Ne A state van der Waals complexes

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Abstract
The nascent ICl product state distribution is examined following vibrational predissociation of ICl–Ne A(vA=23) complexes via an optical–optical double resonance technique. ICl fragments are produced in approximately equal proportion in the vA=22 and 21 levels of the A(3Π1) state. Low rotational levels of ICl A(vA=22) are primarily populated, JA=1–8, accessing only a small portion of allowed states. ICl A(vA=21) fragments are produced with up to 69 cm−1 of rotational energy in a broad distribution which extends to nearly the energetic limit. Homogeneous broadening of the ICl–Ne feature indicates a vibrational predissociation lifetime between 2.3 and 50 ps.