Translational and internal states of hydrogen molecules produced from the ultraviolet photodissociation of amorphous solid methanol

Tetsuya Hama, Masaaki Yokoyama, Akihiro Yabushita, Masahiro Kawasaki

研究成果: Contribution to journalArticle査読

7 被引用数 (Scopus)

抄録

Translationally and internally hot H2 molecules are produced from the 157 nm photodissociation of amorphous solid methanol at 90 K by two distinct mechanisms: exothermic recombination of two H-atom photoproducts bound to the surface and unimolecular molecular elimination of H2 from the photoexcited methanol. The vibrationally hot H2 (v=2-5) products are characterized by high translational and rotational temperatures. A third mechanism, the almost thermoneutral abstraction of a hydrogen atom from methanol parent molecule by the photolytically produced hydrogen atom, yields translationally and rotationally cold H2 (v=0 and 1) products. Comparison with the results of the vacuum ultraviolet photolysis of water ice is discussed. Production of translationally hot and cold hydrogen atoms is also confirmed.

本文言語英語
論文番号164505
ジャーナルJournal of Chemical Physics
130
16
DOI
出版ステータス出版済み - 2009
外部発表はい

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)
  • 物理化学および理論化学

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