Total cross sections for electron scattering with some C₃hydrocarbons

Abstract

Absolute total cross sections (TCSs) for electron scattering from two C3H4 isomers (allene and propyne) and from propane (C3H8) have been measured in a linear electron-beam transmission experiment for impact energy ranging from 0.5 to 370 eV. Low-energy TCS functions for C3H4 are dominated by prominent structures: a resonant-like enhancement of the cross section for allene peaks at around 2.3 and 3.4 eV for propyne, while very broad enhancement is centred at 9.5–10 and 8.0–8.5 eV for allene and propyne respectively. Some supplementary weak features are also discernible. The general shape of cross sections for both C3H4 isomers is similar except that the cross section enhancements are at different locations. In addition, the TCS for propyne has been compared with cross sections for other open-chain hydrocarbons with three carbon atoms, i.e. propene (C3H6) and propane (C3H8), and the effect of the multiplicity of the C–C bond on the low-energy scattering is demonstrated.

Electron scattering from alkenes in the energy range 200–4500 eV

“…Two experimental groups, Szmytkowski and Kwitnewski [3], and Makochekanwa et al [20], have measured the TCS of allene (C 3 H 4 ) at lower energy end of the intermediate energy region. [20] agree well with the predictions by the expression (6) at energies 400 eV and higher while those at lower energies and the cross sections given Ref.…”

“…In recent years, there is increased interest in the study of total electron scattering cross sections (TCS) of hydrocarbons, both experimentally and theoretically, because of the increases demand in many areas of pure and applied sciences [1][2][3][4][5][6][7][8]. It is convenient in these applications if there is an analytical expression to determine the TCS of a given hydrocarbon at a given energy.…”

“…Also, they have stressed the isomer effects and dependence of the geometrical dimensions of the molecule in those TCS. Szmytkowski and Kwitnewski [2][3][4] have reported the TCS of several hydrocarbons at energies 0.5-370 eV and discussed the isomer effect in TCS at these energies. Recently, Sueoka et al [5,6] measured the TCS of a series of alkanes and cyclo-alkanes at energies 0.4-1000 eV and discussed the systematic trends in TCS.…”

“…Three experimental groups: Floeder et al [9], Nishimira and Tawara [10], and Sueoka and Mori [13], have reported the TCS of C 2 H 4 at energies 400 eV and lower. Szmytkowski and Kwitnewski [2][3][4] have reported the TCS of one alkene, C 3 H 6 (propene), and another C-C double bonded hydrocarbon, C 4 H 6 (1,3-butadiene) between the energies 0.5-370 eV.…”

Experimental and theoretical cross sections for positron scattering from the pentane isomers

“…Electronic mail: luca.chiari@rs.tus.ac.jp. (Kossoski et al, 2011), the hydrocarbons C 3 H 4 (Nakano et al, 2002;Szmytkowski and Kwitnewski, 2002b;Lopes and Bettega, 2003;Makochekanwa et al, 2003;Sanchez et al, 2005;, C 3 H 6 (Mott and Massey, 1965;Floeder et al, 1985;Nishimura and Tawara, 1991;Winstead et al, 1992;Szmytkowski and Kwitnewski, 2002a;Makochekanwa et al, 2005;2008;and Tan et al, 2007), C 4 H 6 Kwitnewski, 2003a andLopes et al, 2004a), C 4 H 8 (Lopes et al, 2004b andBettega et al, 2006), and C 4 H 10 (Floeder et al, 1985;Lopes et al, 2004b;and Bettega et al, 2007), as well as five-membered heterocyclic, aromatic compounds (Kossoski and Bettega, 2013). On the other hand, very little is known about the interaction of positrons with isomers, with just a few investigations for hydrocarbons (Floeder et al, 1985;Kimura et al, 2000;Makochekanwa et al, 2003;2008;Sueoka et al, 2005;and Nunes et al, 2015) and chiral enantiomers being available.…”