TY - JOUR

T1 - Scattering of electrons by CH4, CF4 and SF 6 in the 75-700 eV range

AU - Sakae, T.

AU - Sumiyoshi, S.

AU - Murakami, E.

AU - Matsumoto, Y.

AU - Ishibashi, K.

AU - Katase, A.

PY - 1989/12/1

Y1 - 1989/12/1

N2 - Differential cross sections (DCS) have been measured by the crossed-beam method. The angular range is 5-135' and the electron energies are 75, 100, 150, 200, 300, 500 and 700 eV. The overall energy resolution is not sufficient to discriminate elastic scatterings from rotational and vibrational excitations. The absolute DCS are determined by using a gas chamber on the basis of the known absolute DCS for He. The experimental DCS are extrapolated to 0' and 180' scattering angles by fitting the square of the Legendre polynomials to the measured values. The integral and momentum transfer cross sections are then obtained. The errors are about 10% for all experimental results. The present data for CH4 agree well with the previous measurements and calculations. For CF4 and SF6, the DCS increase steeply at the forward angles. The integral cross sections obtained are consistent with the previous results for total and inelastic cross sections.

AB - Differential cross sections (DCS) have been measured by the crossed-beam method. The angular range is 5-135' and the electron energies are 75, 100, 150, 200, 300, 500 and 700 eV. The overall energy resolution is not sufficient to discriminate elastic scatterings from rotational and vibrational excitations. The absolute DCS are determined by using a gas chamber on the basis of the known absolute DCS for He. The experimental DCS are extrapolated to 0' and 180' scattering angles by fitting the square of the Legendre polynomials to the measured values. The integral and momentum transfer cross sections are then obtained. The errors are about 10% for all experimental results. The present data for CH4 agree well with the previous measurements and calculations. For CF4 and SF6, the DCS increase steeply at the forward angles. The integral cross sections obtained are consistent with the previous results for total and inelastic cross sections.

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U2 - 10.1088/0953-4075/22/9/011

DO - 10.1088/0953-4075/22/9/011

M3 - Article

AN - SCOPUS:0009489665

VL - 22

SP - 1385

EP - 1394

JO - Journal of Physics B: Atomic, Molecular and Optical Physics

JF - Journal of Physics B: Atomic, Molecular and Optical Physics

SN - 0953-4075

IS - 9

M1 - 011

ER -