Slice imaging of nitric acid photodissociation: The O({sup 1}D) + HONO channel

Journal Article · Fri Jan 21 04:00:00 EST 2011 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.3540651· OSTI ID:21559981

Herath, Nuradhika; Everhart, Stephanie C; Suits, Arthur G ^[1]; Vasyuntinskii, Oleg S ^[2]

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1. Department of Chemistry, Wayne State University, Detroit, Michigan 48202 (United States)
2. Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg (Russian Federation)

We report an imaging study of nitric acid (HNO{sub 3}) photodissociation near 204 nm with detection of O({sup 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({sup 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{sub 3} (2 {sup 1}A{sup '}) excited state, resolving an inconsistency in previously reported angular distributions, and pointing the way to future studies of the angular momentum polarization.

• OSTI ID: 21559981
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 3 Vol. 134; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS
ALIGNMENT
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
ANISOTROPY
APPROXIMATIONS
CALCULATION METHODS
CHEMICAL REACTIONS
CHEMISTRY
COLLISIONS
DECOMPOSITION
DETECTION
DISSOCIATION
DISTRIBUTION
ENERGY LEVELS
EXCITED STATES
HYDROGEN COMPOUNDS
IMAGES
INORGANIC ACIDS
INORGANIC COMPOUNDS
MOLECULE COLLISIONS
NITRIC ACID
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOCHEMISTRY
PHOTOLYSIS
PHOTON COLLISIONS
PHOTON-MOLECULE COLLISIONS
POLARIZATION
SPECTRA
ULTRAVIOLET SPECTRA
VIBRATIONAL STATES