Kinematic constraints on the final state interaction in photodissociation processes: Predissociative mechanism of NO2 at 337 nm

✍ Scribed by Kuo-mei Chen; Cheng-chih Pei

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 342 KB
• Volume: 137
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(87)80900-4

✦ Synopsis

Rotational population distributions of NO photofragments in the second vibrational excited state from the photofragmentation of NO2 at 337 nm are evaluated numerically via a kinematic distribution function. The kinematic constraints on the final state interaction in the photofragmentation process of NO2 reveal a definitive mechanism of predissociation when the numerically calculated distributions are compared with experimental data. The excited 2Bz state at 29665 cm-' predissociates into the continuum of the ground 'A, electronic state and the anomalous rotational population distributions result from the recoil of oxygen atoms along two crossing points at 3.678 eV between the 2Bz and *A, potential energy surfaces. Although these two surfaces intersect on a double cone, the narrow ranges of recoil angles in the predissociation of NO2 follow strictly after the conservation of energy and the Franck-Condon principle.