Photofragmentation of NOCl in a molecular beam at 193 nm: a bimodal vibrational state distribution

✍ Scribed by B.-M. Haas; P. Felder; J. Robert Huber

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 673 KB
• Volume: 180
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(91)90322-z

✦ Synopsis

The 193 nm photodissociation of NOCI has been studied by photofragment translational spectroscopy under collisionless conditions, Time-of-flight (TOF) distributions of the Cl and NO fragments were measured at various detectton angles and different laser polarizations. The overall vibrational distribution of the NO fragments was found to extend from u" =O to, at least, 0" =24, wnsistmg of two distributions, both centered at around v" = 15. The broad distribution (AU" c 24), having a recoil anisotropy flcO.45, and the narrow one (AU' ~8) with p=O.95, emerge from different reaction channels, i.e. potential energy surfaces of NOCI which evince different vibrational coupling strengths. The results are interpreted in terms of an initial excitation of two close-lying electronic states of A' symmetry.