2024-03-28T12:38:01Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/395112022-11-17T02:08:08Zhdl_2115_20056hdl_2115_147Formation mechanisms of oxygen atoms in the O(3PJ) state from the 157 nm photoirradiation of amorphous water ice at 90 KHama, TetsuyaYabushita, AkihiroYokoyama, MasaakiKawasaki, MasahiroWatanabe, Naokiamorphous statedesorptionground statesiceoxygenphotoionisationphotolysisreaction kineticstranslational statesultraviolet radiation effects428Desorption of ground state O(3P_[J= 2,1,0]) atoms following the vacuum ultraviolet photolysis of water ice in the first absorption band was directly measured with resonance-enhanced multiphoton ionization (REMPI) method. Based on their translational energy distributions and evolution behavior, two different formation mechanisms are proposed: One is exothermic recombination reaction of OH radicals, OH+OH → H2O+O(3PJ) and the other is the photodissociation of OH radicals on the surface of amorphous solid water. The translational and internal energy distributions of OH radicals as well as the evolution behavior were also measured by REMPI to elucidate the roles of H2O2 and OH in the O(3PJ) formation mechanisms. © 2009 American Institute of Physics.American Institute of PhysicsJournal Articleapplication/pdfhttp://hdl.handle.net/2115/39511https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/39511/1/JCP131-11_114511.pdf0021-9606Journal of Chemical Physics131111145112009-09-21enginfo:doi/10.1063/1.3194797Copyright 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Chem. Phys. 131, 114511 (2009) and may be found at https://dx.doi.org/10.1063/1.3194797publisher