title: Photodissociation dynamics of HN3 and DN3 at 157 nm.
abstract: Photodissociation dynamics of HN 3 at 157.6 nm have been studied using the H-atom Rydberg tagging time-of-flight technique. Product translational energy distributions and angular distributions have been measured. From these distributions, three H-atom channels are observed. The vibrational structure in the fast-H channel could be assigned to a progression in the N 3 symmetric stretching mode (nu 100), together with a progression of the symmetric stretching mode with one quantum of bending motion (nu 110). The broad translational energy distribution of the slow-H channel is energetically consistent with the cyclic-N 3 formation process or a triple product dissociation channel. Photodissociation of DN 3 was also investigated using the same technique. Isotope effect on the product translational energy distribution has been observed, in which the slow H-atom is clearly more pronounced.
authors.affiliation: State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
authors.forename: Kaijun
authors.initials: K
authors.lastname: Yuan
authors.forename: Yuan
authors.initials: Y
authors.lastname: Cheng
authors.forename: Fengyan
authors.initials: F
authors.lastname: Wang
authors.forename: Xueming
authors.initials: X
authors.lastname: Yang