Vacuum ultraviolet photodissociation and surface morphology change of water ice films dosed with hydrogen chloride

Akihiro Yabushita, Daichi Kanda, Noboru Kawanaka, Masahiro Kawasaki

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Time-of-flight (TOF) spectra of photofragment H atoms from the photodissociation of water ice films at 193 nm were measured for amorphous and polycrystalline water ice films with and without dosing of hydrogen chloride at 100-145 K. The TOF spectrum is sensitive to the surface morphology of the water ice film because the origin of the H atom is the photodissociation of dimerlike water molecules attached to the ice film surfaces. Adsorption of HCl on a polycrystalline ice film was found to induce formation of disorder regions on the ice film surface at 100-140 K, while the microstructure of the ice surface stayed of polycrystalline at 145 K with adsorption of HCl. The TOF spectra of photofragment Cl atoms from the 157 nm photodissociation of neutral HCl adsorbed on water ice films at 100-140 K were measured. These results suggest partial dissolution of HCl on the ice film surface at 100-140 K.

Original languageEnglish
Article number154721
JournalJournal of Chemical Physics
Volume127
Issue number15
DOIs
Publication statusPublished - Dec 1 2007
Externally publishedYes

Fingerprint

Photodissociation
hydrogen chlorides
Hydrochloric Acid
Ice
photodissociation
Surface morphology
ice
Vacuum
vacuum
Water
water
Atoms
atoms
Adsorption
adsorption
dissolving
Dissolution
disorders
microstructure
Microstructure

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Vacuum ultraviolet photodissociation and surface morphology change of water ice films dosed with hydrogen chloride. / Yabushita, Akihiro; Kanda, Daichi; Kawanaka, Noboru; Kawasaki, Masahiro.

In: Journal of Chemical Physics, Vol. 127, No. 15, 154721, 01.12.2007.

Research output: Contribution to journalArticle

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