scholarly journals Electron Mobility in Liquid Argon

1959 ◽  
Vol 12 (1) ◽  
pp. 105 ◽  
Author(s):  
FD Stacey
Keyword(s):  
Kinetic Theory ◽  
Electric Field ◽  
Electron Energy ◽  
Cross Section ◽  
Drift Velocity ◽  
Electron Mobility ◽  
Alternative Explanation ◽  
Liquid Argon ◽  
Scattering Cross Section ◽  
Scattering Cross

Experiments of Williams (1957) showed that the drift velocity of electrons in liquid argon to which an electric field F is applied is essentially independent of F. If the electrons remain free then their motion can be described by kinetic theory, from which it appears that electron mobility is proportional to F-I and drift velocity to Fli. This is the dependence reported by Malkin and Schultz (1951), but it is evident that the recent, more exhaustive work of Williams (1957) is correct on this point and therefore that kinetic theory is not applicable to the problem. This theory could in principle be extended to explain a fieldindependent velocity, by supposing a special dependence upon electron energy of the scattering cross section for the collision of electrons with argon atoms, but this is very artificial and unnecessary in view of the alternative explanation suggested here; in any case it leaves further serious objections, which will also be discussed briefly.

Electron–lithium elastic scattering in a strong laser field

1988 ◽  
Vol 66 (4) ◽  
pp. 323-325 ◽  
Author(s):  
M. K. Youssef ◽  
M. Lal ◽  
M. K. Srivastava
Keyword(s):  
Elastic Scattering ◽  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Cross Section ◽  
Laser Field ◽  
Forward Direction ◽  
Scattering Cross Section ◽  
Strong Laser Field ◽  
Scattering Cross

The elastic scattering of electrons by lithium in the presence of a laser field, which is strong by laboratory standards but weak compared with 1 au of electric-field strength, is studied near the forward direction to investigate the effect of the target "dressing." The scattering cross section is found to increase to more than 50 times the undressed value at scattering angles of [Formula: see text].

scholarly journals Спектроскопия потерь энергии отраженных электронов γ-Fe-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-

2021 ◽  
Vol 63 (8) ◽  
pp. 1049
Author(s):  
А.С. Паршин ◽  
Ю.Л. Михлин ◽  
Г.А. Александрова
Keyword(s):  
Inelastic Scattering ◽  
Electron Energy ◽  
Cross Section ◽  
Mean Free Path ◽  
Primary Electron ◽  
Scattering Cross Section ◽  
Energy Losses ◽  
Inelastic Electron ◽  
Primary Electron Energy ◽  
Scattering Cross

The reflection electron energy losses spectra, obtained in a wide primary electron energy range of 200 - 3000 eV, are investigated. From these experimental spectra, for each primary electron energy, the spectra of the inelastic scattering cross section of electrons are calculated as the dependence of the product of the inelastic electron mean free path and the differential inelastic scattering cross section of electrons on the electron energy loss. The analysis of the fine structure of the reflection electron energy losses was carried out by decomposing the electron energy losses spectra in the region of energy losses of valence electrons into elementary peaks. A relationship is established between each of their elementary peaks with single and multiple energy losses due to the excitation of bulk and surface plasmons and interband transitions of electrons from the valence band to free states above the Fermi level. The analysis of the obtained results was carried out on the basis of experimental and theoretical literature data on the band structure of  Fe2O3.

Electron scattering cross sections of gaseous pentanes and hexanes

1979 ◽  
Vol 57 (19) ◽  
pp. 2626-2628 ◽  
Author(s):  
Gordon R. Freeman ◽  
István György ◽  
Sam S.-S. Huang
Keyword(s):  
Electron Energy ◽  
Cross Section ◽  
Electron Scattering ◽  
Cross Sections ◽  
Scattering Cross Section ◽  
Low Energy ◽  
Electron Velocity ◽  
Scattering Cross ◽  
Scattering Cross Sections ◽  
Energy Side

Electron scattering cross sections σv have been estimated as functions of electron velocity v for six gaseous pentanes and hexanes. The scattering cross section of each compound has a minimum in the vicinity of υ = (2–3) 107 cm/s, corresponding to an electron energy of 0.1–0.2 eV. For the pentanes, the scattering cross sections on the low energy side of the minimum increase with increasing sphericity of the molecules, while the minimum tends to shift to higher energies. The same is true of the hexanes.

Experimental evidence for the existence of a Ramsauer–Townsend minimum in liquid CH4 and Ar (Kr and Xe) and in gaseous C2H6 and C3H8

1977 ◽  
Vol 55 (11) ◽  
pp. 1876-1884 ◽  
Author(s):  
L. G. Christophorou ◽  
D. L. McCorkle
Keyword(s):  
Experimental Evidence ◽  
Cross Section ◽  
Electron Scattering ◽  
Cross Sections ◽  
Electron Mobility ◽  
Scattering Cross Section ◽  
Thermal Electron ◽  
Scattering Cross ◽  
Dilute Gas ◽  
Scattering Cross Sections

Experimental evidence for the existence of a Ramsauer–Townsend minimum in the electron scattering cross section for liquid CH4 and liquid Ar (Kr and Xe) is presented and discussed. On the basis of evidence obtained from three sources: (i) comparisons of thermal electron mobilities in gases with those in liquids, (ii) changes in the electron mobility with gas density at high and very high gas pressures, and (iii) the dependence of the electron mobility on temperature for liquids whose V0, the energy of the electron state in the liquid, is ≤0 eV, it is concluded that a Ramsauer–Townsend minimum is exhibited by the electron scattering cross section for CH4, Ar (Kr and Xe) at all densities from a dilute gas to the liquid and that this minimum is shifted to lower energies (closer to thermal) with increasing density.Additionally, it has been found that a Ramsauer–Townsend-type behavior is exhibited by gaseous ethane (C2H6) and propane (C3H8) with the cross section minimum located at lower energies than for methane (CH4). For these latter molecules the measured mean scattering cross sections at thermal energies are comparable with the geometric cross sections.

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