[20p-E319-1~10] 【CS.6】 Code-sharing Session of 6.5 & 7.6

[20p-E319-8] Branching mechanism of Br and Cl formations by photodissociation of halothane

〇Dockchil Che¹, Masaaki Nakamura², Toshio Kasai², King-Chuen Lin², Federico Palazzetti³, Vincenzo Aquilanti³ (1.Osaka Univ., 2.NTU, 3.Perugia Univ.)

Keywords:molecular beam, branching mechanism, 2D imaging techniqu

Photodissociation dynamics of state-selected halothane molecules using hexapole-electric field were studied. The angular and speed distributions of the Br and Cl atoms formed in reaction were determined by a two-dimensional imaging technique. From the obtained results, the Br atom has a large translational energy distribution, and the anisotropy parameter shows a value close to 2. This results suggests that the Br formation occurs by direct dissociation after photoexcitation. On the other hand, it was found that the Cl atom formation shows a small fraction of translational energy distribution. This indicates that the formation of Br and Cl is via different potential surfaces.