NO/sub 3/ quantum yields from N/sub 2/O/sub 5/ photolysis. [N/sub 2/O/sub 5/]

Journal Article · Thu Jul 05 04:00:00 EDT 1984 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150658a038· OSTI ID:6614338

Swanson, D; Kan, B; Johnston, H S

The technique of laser flash photolysis/laser resonance absorption was used to directly measure the quantum yield for NO/sub 3/ production upon ultraviolet photolysis of N/sub 2/O/sub 5/. The average NO/sub 3/ quantum yield was found to be 0.89 +/- 0.15. There appeared to be a slight decrease in quantum yield as the concentration of N/sub 2/O/sub 5/ increased and as the pressure of carrier gas (N/sub 2/ or O/sub 2/f increased. The indicated NO/sub 3/ quantum yield at low N/sub 2/O/sub 5/ concentration and low gas pressure is 1.0, but there is uncertainty from the experimental error. A fast rise in the concentration of NO/sub 3/(..nu.. = 0) was observed, and the rise time was dependent on N/sub 2/O/sub 5/ concentration and on N/sub 2/ pressure. These data are interpreted to give rate constants for the deactivation process NO/sub 3/(..nu.. > 0) + M ..-->.. NO/sub 3/(..nu.. = 0) + M where k(N/sub 2/O/sub 5/) = (4.0 +/- 1.0) x 10/sup -12/ cm/sup 3/ molecule/sup -1/ s/sup -1/ and k(N/sub 2/) = (1.6 +/- 0.3) x 10/sup -13/ cm/sup 3/ molecule/sup -1/ s/sup -1/. 9 references, 5 figures, 1 table.

• Research Organization: Univ. of California, Berkeley
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6614338
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 88:14; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ABSORPTION SPECTROSCOPY
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
INFORMATION
KINETICS
LASER RADIATION
LOW PRESSURE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADIATIONS
REACTION KINETICS
SPECTROSCOPY
TIME DEPENDENCE
ULTRAVIOLET RADIATION