A New Channel of Hydrogen Elimination in the 121.6-nm Photodissociation of Formic Acid Detected by a Doppler-Selected TOF Mass Spectrometry
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概要
- 論文の詳細を見る
Hydrogen-atom elimination channels in 121.6-nm photodissociation of formic acid were investigated by a Doppler-selected TOF mass spectrometry (DS-TOF-MS). This mass spectroscopic method enables us to map out three dimensional velocity distributions of photodissociated products through multiphoton ionization for the H atoms, and therefore we can determine anisotropic parameter β. The H+HCOO* channel is found to be a main branching among many H elimination channels. A new three-body channel of H+CO+OH is observed. We estimate that the H+HCOO* channel is more favor than the H+CO+OH channel by a factor of ~5. Other H-elimination channels such as H+HCOO, 2H+CO2, H+HOCO, and H+CO+OH(A) are found to be small. These results show that the DS-TOF-MS method is useful to determine branching ratios and internal energy distributions of photodissociated products in excited states as well as ground states in addition to anisotropic parameter determination.
- 日本質量分析学会の論文
- 2002-02-01
著者
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Ohoyama H
Osaka Univ. Osaka
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Ohoyama Hiroshi
Department Of Chemistry Graduate School Of Science Osaka University
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Kasai Toshio
Department Of Cardiology National Hospital Organization Nagano Hospital
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HASHINOKUCHI Michihiro
Department of Chemistry, Graduate School of Science, Osaka University
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KOUMURA Ryoji
Department of Chemistry, Graduate School of Science, Osaka University
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CHE Dock-Chil
Institute for Molecular Science
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Koumura Ryoji
Department Of Chemistry Graduate School Of Science Osaka University
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Che D‐c
Institute For Molecular Science
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Kasai Toshio
Department Of Chemistry Graduate School Of Science Osaka University
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Hashinokuchi Michihiro
Department Of Chemistry Graduate School Of Science Osaka University
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KASAI Toshio
Department of Chemistry, Graduate School of Science, Osaka University
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