Differential elastic electron scattering cross sections for ethane in the energy range from 2 to 100 eV

Tanaka, Hiroshi; Boesten, L.; Matsunaga, Daisuke; Kudo, Terohiko

doi:10.1088/0953-4075/21/7/019

Cited by 76 publications

(63 citation statements)

References 27 publications

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“…Within a reasonable margin of error (∼10%), the present result provides a good description of the grand total cross section in both the energy dependence, and magnitude, below 30 eV. It exhibits an increasing trend in magnitude due to the 2 resonance at ∼1.3 eV and a weak maximum due to the overlapping 2 and 2 resonances at 3.7 eV. These summed total cross sections are also in fairly good agreement with the previous experimental data.…”

Section: Resultssupporting

confidence: 89%

“…The behavior at lower energies is no doubt driven by several low energy resonances which have been revealed in previous experimental and theoretical studies. These include a 2 resonance at 1.2-1.33 eV and overlapping 2 and 2 resonances at around 3.7 eV. 29 In general, the angular distribution of the scattered electron reflects the specific angular momentum involved with a shape resonance.…”

Section: Resultsmentioning

confidence: 99%

“…for OCS, and 59.8 a.u. for CS 2 . 18 In addition, only OCS has a permanent dipole moment of 0.715 D. 19 The sulphur atoms in CS 2 , with low-lying d orbitals, have a significant influence on the chemical bonding as well as a prominent role in the ionization dynamics of the molecule.…”

Section: Introductionmentioning

confidence: 99%

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A comprehensive and comparative study of elastic electron scattering from OCS and CS2 in the energy region from 1.2 to 200 eV

Murai

Ishijima

Mitsumura

et al. 2013

The Journal of Chemical Physics

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We report absolute differential cross sections (DCSs) for elastic electron scattering from OCS (carbonyl sulphide) and CS 2 (carbon disulphide) in the impact energy range of 1.2-200 eV and for scattering angles from 10 • to 150 • . Above 10 eV, the angular distributions are found to agree quite well with our present calculations using two semi-phenomenological theoretical approaches. One employs the independent-atom model with the screening-corrected additivity rule (IAM-SCAR), while the other uses the continuum-multiple-scattering method in conjunction with a parameterfree exchange-polarization approximation. Since OCS is a polar molecule, further dipole-induced rotational excitation cross sections have been calculated in the framework of the first Born approximation and incoherently added to the IAM-SCAR results. In comparison with the calculated DCS for the S atom, atomic-like behavior for the angular distributions in both the OCS and CS 2 scattering systems is observed. Integrated elastic cross sections are obtained by extrapolating the experimental measurements, with the aid of the theoretical calculations, for those scattering angles below 10 • and above 150 • . These values are then compared with the available total cross sections.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

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A comprehensive and comparative study of elastic electron scattering from OCS and CS2 in the energy region from 1.2 to 200 eV

Murai

Ishijima

Mitsumura

et al. 2013

The Journal of Chemical Physics

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“…However, the differential cross sections (DCSs) of the straight-chain molecules, namely ethanol, n-propanol, and n-butanol, show an f -wave scattering pattern between 5 to 10 eV, while branched systems such as isobutanol, t-butanol, and 2-butanol show a d-wave pattern. Similar behavior was also seen in alkanes [4][5][6][7][8][9][10][11][12]. These results suggest that the DCS of isopropanol (propan-2-ol or isopropyl alcohol), the branched isomer of C 3 H 7 OH, should also exhibit a d-wave pattern.…”

Section: Introductionsupporting

confidence: 67%

Collisions of low-energy electrons with isopropanol

et al. 2011

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We report measured and calculated cross sections for elastic scattering of low-energy electrons by isopropanol (propan-2-ol). The experimental data were obtained using the relative flow technique with helium as the standard gas and a thin aperture as the collimating target gas source, which permits use of this method without the restrictions imposed by the relative flow pressure conditions on helium and the unknown gas. The differential cross sections were measured at energies of 1.5, 2, 3, 5, 6, 8, 10, 15, 20, and 30 eV and for scattering angles from 10 • to 130 • . The cross sections were computed over the same energy range employing the Schwinger multichannel method in the static-exchange plus polarization approximation. Agreement between theory and experiment is very good. The present data are compared with previously calculated and measured results for n-propanol, the other isomer of C 3 H 7 OH. Although the integral and momentum transfer cross sections for the isomers are very similar, the differential cross sections show a strong isomeric effect: In contrast to the f -wave behavior seen in scattering by n-propanol, d-wave behavior is observed in the cross sections of isopropanol. These results corroborate our previous observations in electron collisions with isomers of C 4 H 9 OH.

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“…The present experimental apparatus and method have been described in detail in earlier papers, 27,28 so that only a brief précis of them is required here. The apparatus consists of an electron-scattering spectrometer, gas flow system, and counting electronics for detecting and storing the scattered electron signal.…”

Section: A Apparatus and Operating Proceduresmentioning

confidence: 99%

Cross sections for elastic scattering of electrons by CF3Cl, CF2Cl2, and CFCl3

Hoshino

Horie

Kato

et al. 2013

The Journal of Chemical Physics

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Differential, integral, and momentum transfer cross sections have been determined for the elastic scattering of electrons from the molecules CF3Cl, CF2Cl2, and CFCl3.With the help of a crossed electron beam–molecular beam apparatus using the relative flow technique, the ratios of the elastic differential cross sections (DCSs) of CF3Cl, CF2Cl2, and CFCl3 to those of He were measured in the energy region from 1.5 to 100 eV and at scattering angles in the range 15° to 130°. From those ratios, the absolute DCSs were determined by utilizing the known DCS of He. For CF3Cl and CF2Cl2, at the common energies of measurement, we find generally good agreement with the results from the independent experiments of Mann and Linder [J. Phys. B 25, 1621 (1992)10.1088/0953-4075/25/7/030; Mann and Linder J. Phys. B 25, 1633 (1992)10.1088/0953-4075/25/7/031]. In addition, as a result of progressively substituting a Cl-atom, undulations in the angular distributions have been found to vary in a largely systematic manner in going from CF4 to CF3Cl to CF2Cl2 to CFCl3 and to CCl4. These observed features suggest that the elastic scattering process is, in an independently additive manner, dominated by the atomic-Cl atoms of the molecules. The present independent atom method calculation typically supports the experimental evidence, within the screened additivity rule formulation, for each species and for energies greater than about 10–20 eV. Integral elastic and momentum transfer cross sections were also derived from the measured DCSs, and are compared to the other available theoretical and experimental results. The elastic integral cross sections are also evaluated as a part of their contribution to the total cross section.

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Differential elastic electron scattering cross sections for ethane in the energy range from 2 to 100 eV

Cited by 76 publications

References 27 publications

A comprehensive and comparative study of elastic electron scattering from OCS and CS2 in the energy region from 1.2 to 200 eV

A comprehensive and comparative study of elastic electron scattering from OCS and CS2 in the energy region from 1.2 to 200 eV

Collisions of low-energy electrons with isopropanol

Cross sections for elastic scattering of electrons by CF3Cl, CF2Cl2, and CFCl3

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