Energy partitioning in the 532 nm photofragmentation of nitrosyl cyanide (NCNO)

J. Pfab, J. Hager, W. Krieger

Research output: Contribution to journalArticle

Abstract

The 532 nm photodissociation of gaseous NCNO has been studied by a tandem pulse technique utilizing repetitive nanosecond laser pulses for dissociation and for delayed, time-correlated laser-induced fluorescence probing. Dissociation occurs within less than 3 ns, and both CN(X) and NO(X) have been identified as primary fragments. The central portions of their rotational distributions correspond to Boltzmann distributions with temperatures of (1010 ± 50) K for CN and (930 ± 50) K for NO. Parent rotation and angular momentum from bending vibrations of the A state levels populated at 532 nm account for the observed fragment rotation. Little angular momentum is partitioned into orbital motion of the fragments indicating that the molecule dissociates from a linear or quasilinear nuclear configuration. The observed distribution of the 9300 cm-1 of available energy into internal and relative translational degrees of freedom of the fragments is consistent with predissociation of bound à state levels into the continuum of ground state NCNO. © 1983 American Institute of Physics.

Original languageEnglish
Pages (from-to)266-274
Number of pages9
JournalJournal of Chemical Physics
Volume78
Issue number1
Publication statusPublished - 1982

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