Release of oxygen atoms and nitric oxide molecules from the ultraviolet photodissociation of nitrate adsorbed on water ice films at 100 K

Akihiro Yabushita, Noboru Kawanaka, Masahiro Kawasaki, Paul D. Hamer, Dudley E. Shallcross

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Production of O(3PJ, J = 2, 1, 0) atoms from the 295-320 nm photodissociation of NO3- adsorbed on water polycrystalline ice films at 100 K was directly confirmed using the resonance-enhanced multiphoton ionization technique. Detection of the O atom signals required an induction period after deposition of HNO3 onto the ice film held at 130 K due to the slow ionization rate of HNO3 to H+ and NO3- with a rate constant of k = (5.3 ± 0.2) × 10-3 s-1. Translational energy distributions of the O atoms were represented by a combination of two Maxwell-Boltzmann energy distributions with translational temperatures of 2000 and 100 K. Direct detection of NO from the secondary photodissociation process was also successful. On the atmospheric implications, the influence of the direct release of the oxygen atoms into the air from NO3- adsorbed on the natural snowpack was included in an atmospheric model calculation on the mixing ratios of ozone and nitric oxide at the South Pole, and the results compared favorably with the field data.

Original languageEnglish
Pages (from-to)8629-8634
Number of pages6
JournalJournal of Physical Chemistry A
Volume111
Issue number35
DOIs
Publication statusPublished - Sep 6 2007
Externally publishedYes

Fingerprint

Photodissociation
Ice
nitric oxide
Nitrates
photodissociation
nitrates
oxygen atoms
Nitric Oxide
ice
Oxygen
Atoms
Molecules
oxides
Water
energy distribution
water
Ionization
atoms
molecules
ionization

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry

Cite this

Release of oxygen atoms and nitric oxide molecules from the ultraviolet photodissociation of nitrate adsorbed on water ice films at 100 K. / Yabushita, Akihiro; Kawanaka, Noboru; Kawasaki, Masahiro; Hamer, Paul D.; Shallcross, Dudley E.

In: Journal of Physical Chemistry A, Vol. 111, No. 35, 06.09.2007, p. 8629-8634.

Research output: Contribution to journalArticle

Yabushita, Akihiro ; Kawanaka, Noboru ; Kawasaki, Masahiro ; Hamer, Paul D. ; Shallcross, Dudley E. / Release of oxygen atoms and nitric oxide molecules from the ultraviolet photodissociation of nitrate adsorbed on water ice films at 100 K. In: Journal of Physical Chemistry A. 2007 ; Vol. 111, No. 35. pp. 8629-8634.
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AU - Yabushita, Akihiro

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AU - Hamer, Paul D.

AU - Shallcross, Dudley E.

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