title: Absolute vibrational cross sections for 1-19 eV electron scattering from condensed tetrahydrofuran (THF).
abstract: Absolute cross sections (CSs) for vibrational excitation by 1-19 eV electrons impacting on condensed tetrahydrofuran (THF) were measured with a high-resolution electron energy loss spectrometer. Experiments were performed under ultra-high vacuum (3 × 10(-11) Torr) at a temperature of about 20 K. The magnitudes of the vibrational CSs lie within the 10(-17) cm(2) range. Features observed near 4.5, 9.5, and 12.5 eV in the incident energy dependence of the CSs were compared to the results of theoretical calculations and other experiments on gas and solid-phase THF. These three resonances are attributed to the formation of shape or core-excited shape resonances. Another maximum observed around 2.5 eV is not found in the calculations but has been observed in gas-phase studies; it is attributed to the formation of a shape resonance.
authors.affiliation: Groupe en Sciences des Radiations, Département de Médecine Nucléaire et Radiobiologie, Faculté de Médecine et Sciences des Radiations, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada.
authors.forename: V
authors.initials: V
authors.lastname: Lemelin
authors.affiliation: Groupe en Sciences des Radiations, Département de Médecine Nucléaire et Radiobiologie, Faculté de Médecine et Sciences des Radiations, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada.
authors.forename: A D
authors.initials: AD
authors.lastname: Bass
authors.affiliation: Groupe en Sciences des Radiations, Département de Médecine Nucléaire et Radiobiologie, Faculté de Médecine et Sciences des Radiations, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada.
authors.forename: P
authors.initials: P
authors.lastname: Cloutier
authors.affiliation: Groupe en Sciences des Radiations, Département de Médecine Nucléaire et Radiobiologie, Faculté de Médecine et Sciences des Radiations, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada.
authors.forename: L
authors.initials: L
authors.lastname: Sanche
mesh_terms: D004583:Electrons; D005663:Furans / Q000737:chemistry*; D013057:Spectrum Analysis; D014732:Vibration
chemical_list: D005663:Furans; C018674:tetrahydrofuran