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Title: Calculation of the excitation cross sections for the {sup 1}{Sigma}{sub u}{sup +} and {ital C} {sup 1}{Pi}{sub u}{sup +} states in {ital e}-H{sub 2} scattering at 60 eV

Abstract

Integral cross sections have been calculated for the dipole-allowed transitions from {ital X} {sup 1}{Sigma}{sub g}{sup +} to the {sup 1}{Sigma}{sub u}{sup +} and the {ital C} {sup 1}{Pi}{sub u}{sup +} states in electron--hydrogen-molecule scattering at 60 eV. Experimental data and a universal function [A. Z. Msezane and I. A. Sakmar, Phys. Rev. A 49, 2405 (1994)], which can extrapolate the generalized oscillator strength through the nonphysical region to {ital K}{sup 2} (momentum transfer squared) =0, have been used in the calculation. A better agreement between theoretical results and experimental data has been achieved by using the universal function in the range of small scattering angles ({theta}{lt}10{degree}). The results show that the extrapolation used by experimentalists underestimated the differential cross sections (DCS`s) at small scattering angles. Our calculation suggests that the universal function can be used to extrapolate the DCS for the electron-molecule scattering down to 0{degree} at high energy.

Authors:
;  [1]
  1. Center for Theoretical Studies of Physical Systems and the Department of Physics, Clark Atlanta University, Atlanta, Georgia 30314 (United States)
Publication Date:
OSTI Identifier:
44649
Resource Type:
Journal Article
Journal Name:
Physical Review A
Additional Journal Information:
Journal Volume: 51; Journal Issue: 5; Other Information: PBD: May 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; HYDROGEN; ELECTRON-MOLECULE COLLISIONS; EXCITATION; SMALL ANGLE SCATTERING; INTEGRAL CROSS SECTIONS; ERRORS

Citation Formats

Chen, Z, and Msezane, A Z. Calculation of the excitation cross sections for the {sup 1}{Sigma}{sub u}{sup +} and {ital C} {sup 1}{Pi}{sub u}{sup +} states in {ital e}-H{sub 2} scattering at 60 eV. United States: N. p., 1995. Web. doi:10.1103/PhysRevA.51.3745.
Chen, Z, & Msezane, A Z. Calculation of the excitation cross sections for the {sup 1}{Sigma}{sub u}{sup +} and {ital C} {sup 1}{Pi}{sub u}{sup +} states in {ital e}-H{sub 2} scattering at 60 eV. United States. doi:10.1103/PhysRevA.51.3745.
Chen, Z, and Msezane, A Z. Mon . "Calculation of the excitation cross sections for the {sup 1}{Sigma}{sub u}{sup +} and {ital C} {sup 1}{Pi}{sub u}{sup +} states in {ital e}-H{sub 2} scattering at 60 eV". United States. doi:10.1103/PhysRevA.51.3745.
@article{osti_44649,
title = {Calculation of the excitation cross sections for the {sup 1}{Sigma}{sub u}{sup +} and {ital C} {sup 1}{Pi}{sub u}{sup +} states in {ital e}-H{sub 2} scattering at 60 eV},
author = {Chen, Z and Msezane, A Z},
abstractNote = {Integral cross sections have been calculated for the dipole-allowed transitions from {ital X} {sup 1}{Sigma}{sub g}{sup +} to the {sup 1}{Sigma}{sub u}{sup +} and the {ital C} {sup 1}{Pi}{sub u}{sup +} states in electron--hydrogen-molecule scattering at 60 eV. Experimental data and a universal function [A. Z. Msezane and I. A. Sakmar, Phys. Rev. A 49, 2405 (1994)], which can extrapolate the generalized oscillator strength through the nonphysical region to {ital K}{sup 2} (momentum transfer squared) =0, have been used in the calculation. A better agreement between theoretical results and experimental data has been achieved by using the universal function in the range of small scattering angles ({theta}{lt}10{degree}). The results show that the extrapolation used by experimentalists underestimated the differential cross sections (DCS`s) at small scattering angles. Our calculation suggests that the universal function can be used to extrapolate the DCS for the electron-molecule scattering down to 0{degree} at high energy.},
doi = {10.1103/PhysRevA.51.3745},
journal = {Physical Review A},
number = 5,
volume = 51,
place = {United States},
year = {1995},
month = {5}
}