A comparative experimental-theoretical study on elastic electron scattering by methane

被引：25

作者：

Cho, H. ^{[1
]}

Park, Y. S. ^{[1
]}

Castro, E. A. Y. ^{[2
,3
]}

de Souza, G. L. C. ^{[2
]}

Iga, I. ^{[2
]}

Machado, L. E. ^{[3
]}

Brescansin, L. M. ^{[4
]}

Lee, M-T ^{[2
]}

机构：

[1] Chungnam Natl Univ, Dept Phys, Taejon 305764, South Korea

[2] Univ Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos, SP, Brazil

[3] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP, Brazil

[4] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2008年 / 41卷 / 04期

关键词：

D O I：

10.1088/0953-4075/41/4/045203

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Absolute differential cross sections for elastic electron scattering by methane have been measured at six incident electron energies between 5 and 100 eV and over scattering angles between 10 degrees and 180 degrees, using a crossed-beam electron spectrometer combined with a magnetic angle-changing device to extend the measurements to backward angles (125 degrees-180 degrees). Differential, integral and momentum-transfer cross sections are also calculated and reported for these energies. A complex optical potential was used to represent the electron-molecule interaction dynamics. The iterative Schwinger variational method combined with the distorted-wave approximation was used to solve the scattering equations. The comparison between our calculated and measured results, as well as with other experimental and theoretical data available in the literature, is encouraging.

引用

页数：7

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