Slice imaging of nitric acid photodissociation: The O(1D) + HONO channel.
We report an imaging study of nitric acid (HNO(3)) photodissociation near 204 nm with detection of O((1)D), one of the major decomposition products in this region. The images show structure reflecting the vibrational distribution of the HONO coproduct and significant angular anisotropy that varies with recoil speed. The images also show substantial alignment of the O((1)D) orbital, which is analyzed using an approximate treatment that reveals that the polarization is dominated by incoherent, high order contributions. The results offer additional insight into the dynamics of the dissociation of nitric acid through the S(3) (2 (1)A(')) excited state, resolving an inconsistency in previously reported angular distributions, and pointing the way to future studies of the angular momentum polarization.
Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
Nuradhika
N
Herath
Stephanie C
SC
Everhart
Arthur G
AG
Suits
Oleg S
OS
Vasyuntinskii
D017942:Nitric Acid / Q000737:chemistry*; D009608:Nitrous Acid / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D055668:Photochemical Processes; D011789:Quantum Theory
D017942:Nitric Acid; D010100:Oxygen; D009608:Nitrous Acid