Anomalously small jet-cooling of benzene: Absence of efficient low-energy collision-induced vibrational relaxation |
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| Affiliation: | 1. Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, Niijuku 6-3-1, Katsushika-ku, Tokyo 125-8585, Japan;2. Department of Industrial Chemistry, Graduate School of Engineering, Tokyo University of Science, Niijuku 6-3-1, Katsushika-ku, Tokyo 125-8585, Japan;3. Universiti Technologi Malaysia, Malaysia Japan International Institute of Technology, Off Jalan Sultan Yahya Petra, Kuala Lumpur 54100, Malaysia |
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| Abstract: | Benzene, compared to other supersonic jet-cooled molecules, including ring-substituted benzene derivatives, appears to show a general lack of vibrational cooling in seeded He or Ar supersonic expansions. The general extent of vibrational non-cooling suggests that He or Ar collisions may simply be relatively ineffective in cooling benzene. A number of other gases were also seeded into He-benzene expansions but the vibrational cooling of mode 6, which was monitored carefully, was not substantially improved. |
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