Rotational states of CHCN selected using hexapole electric field (Cooperative research)

Hashinokuchi, Michihiro*; Okada, Michio*; Kasai, Toshio*; Moritani, Kosuke; Teraoka, Yuden

The dynamical processes such as the energy transfer of a molecule to a surface, etc. play an important role in surface chemical reactions. An oriented-molecular-beam method can provide a great insight into these processes. We have developed a UHV-compatible oriented-molecular-beam machine. In the present study, we performed rotational-state selection of CHCN using hexapole electric field. We measured the focusing curve of CHCN, which was reproduced by the trajectory simulation including the second-order Stark effect in the inhomogeneous hexapole electric field. The expected orientation distributions suggest our ability to control the molecular orientation in surface reactions.