Electron and positron scattering from the benzene derivative benzotrifluoride:Total and vibrational excitation cross sections

摘要

Electron and positron cross sections have been investigated experimentally for scattering from benzotrifluo-ride (C_6ΡН_5CF_3) molecules over the energy range 0.2-1000 eV. The current results have been compared withour previous results for С_бH_б molecules. Similar to С_6Н_6, a peak has been observed in electron total crosssections (TCS) centered at 8.0 and a shoulder at about 40 eV. Vibrational excitation cross section experimentswere carried out to probe the origin and nature of the 8 eV peak. For positron TCS, a broad peak spanning theregion 0.8-15 eV and a change in slope at about 40 eV are observed with the only difference between thecurrent results and those of СбНб observed in the region 1-100 eV.