| Affiliation: | (1) Graduate School of Sciences, Kyushu University, Fukuoka 812-8581, Japan;(2) Department of Physics, Sophia University, Tokyo 102-8554, Japan;(3) Physics Department, Chungnam National University, Daejeon, 305-764, South Korea;(4) Faculty of Engineering, Yamaguchi University, Ube 755-8611, Japan |
| Abstract: | We have carried out experimental and theoreticalstudies on electron scattering from the C3H6 isomers andC3F6 molecules and we report on total, differential as wellas theoretical integral elastic cross-sections for thesemolecules. Vibrational excitation functions are also presented forthe typical vibrational peaks in C3H6 and cyclo-C3H6for the angle of 90○, impact energy range of 1–16 eVand loss energies of 0.12 eV and 0.13 eV, respectively. In thecross-sections, clear differences in peak positions and magnitudesbetween the C3H6 isomers can be viewed as the isomer effect.The same is observed between C3H6 and C3F6 in a clearmanifestation of the fluorination effect. The resemblance of theπ* shape resonance in the cross-sections, observed at about2.2 eV for C3H6 and 3.5 eV for C3F6, to those inC2H4 and C2F4 clearly points to the effect of thedouble bond in the molecular structures for these molecules.Theoretical analysis is performed to provide rationales for thescattering dynamics. |
