Cross sections for electron scattering from α-tetrahydrofurfuryl alcohol

Differential cross sections for intermediate-energy electron scattering from α-tetrahydrofurfuryl alcohol: Excitation of electronic-states

“…22 we previously outlined our spectral deconvolution approach, and the basis 20,22 for that approach, and so we also do not repeat that detail again here. Rather, we simply note that the various EELS were deconvoluted, using a standard least-squares fitting procedure, into contributions arising from each individual or unresolved combination of excited electronic-states.…”

“…The short-dashed green lines represent spectral features of individual spectral deconvolution bands (bands 1-5, respectively), while the blue longer dashes indicate the bands which are subsequently combined together (i.e., bands 1+2, band 3, and bands 4+5). 22 Also indicated are the excitation energies for the electronic spectrum of the isomers A and C of THFA as calculated by Limão-Vieira et al 20 trons, with a typical current of 1-3 nA, was incident on an orthogonal beam of THFA molecules. That molecular beam was formed by allowing vapour from a high-purity THFA sample (Sigma-Aldrich, 99% assay) to effuse through a single capillary of 0.7 mm internal diameter.…”

“…As a consequence, our group has conducted a series of gas phase studies on its absolute photoabsorption cross section and photoionisation behaviour, 20 a quantum chemical investigation of its excited electronic-state spectroscopy, 20 absolute DCS and integral cross section (ICS) measurements for electron-impact vibrational excitation 21 and a preliminary report describing ICS measurements for electron excitation of a series of its Rydberg electronic-states. 22 In that latter paper we also reported theoretical results from our independent atom model (IAM) with screened additivity rule (SCAR) correction computations, for the total cross section (TCS), elastic ICS, inelastic ICS (all discrete electronic-states and neutral dissociation), and the total ionisation ICS. 22 Here, we conclude this work by reporting the corresponding Rydberg electronicstate DCSs and our IAM-SCAR elastic DCSs.…”

“…22 In that latter paper we also reported theoretical results from our independent atom model (IAM) with screened additivity rule (SCAR) correction computations, for the total cross section (TCS), elastic ICS, inelastic ICS (all discrete electronic-states and neutral dissociation), and the total ionisation ICS. 22 Here, we conclude this work by reporting the corresponding Rydberg electronicstate DCSs and our IAM-SCAR elastic DCSs. Note that a full summary of previous investigations for photon, electron, and positron scattering from THFA can be found in Refs.…”

Excitation of vibrational quanta in furfural by intermediate-energy electrons

“…For instance for some of the composite vibrational modes, 5,7,11 for incident electron energies between 15 and 50 eV, the angular distributions of the cross sections are quasi-isotropic, whereas at those same energies, the elastic angular distributions and the angular distributions for the optically allowed discrete-inelastic electronic states are often strongly peaked in magnitude [20][21][22][23][24][25][26][27][28][29] at the smaller scattered electron angles. That latter behaviour is understood in terms of the strong dipole polarisabilities and permanent dipole moments of the molecules in question.…”