Decay dynamics of H2O(1B1): full characterization of OH product state distribution

✍ Scribed by Klaus Mikulecky; Karl-Heinz Gericke; Franz Josef Comes

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 576 KB
• Volume: 182
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(91)80217-l

✦ Synopsis

HZ0 was excited to the lowest electronic excited state, 'B,, at 157.6 nm and the OH product state distribution was completely analyzed by special laser-induced-fluorescence (LIF) experiments probing the fragment distribution by the transitions (u' = 0, 1 tvn ). The OH rotational excitation is relatively low and can be described by a temperature parameter of z 500 K independently of the OH vibrational excitation. This is in accordance with former measurements as well as with theoretical calculations. No selective population of the electronic fine-structure levels was observed which is in agreement with the expectations for a room-temperature experiment. The observed magnitude of the vibrational excitation (P( u" ~0) : P(u" = 1) : P( u" = 2) : P( u" = 3) : P(v' =4) = 59.2: 33.1 : 6. I : 1.4:0.2) is smaller than the one calculated. The calculations predicted the v" = 6 level to be populated, whereas in the experiment, transitions probing the v"=5 state were not observed.