Coupled-channels optical theory for e-H scattering

Cross sections and angular correlation parameters for scattering within the 1s, 2s, 2p channel space in the electron-hydrogen problem are calculated at 50, 54.4, 100 and 200 eV. The integral equations for the momentum-space formulation of the problem are solved with a numerical accuracy of approximately 1%. Discrete and continuum channels outside the reaction space are explicitly taken into account by computing the corresponding optical potentials and adding them to the coupling potential. Exchange terms are calculated at all stages. Relative elastic cross sections, absolute inelastic cross sections, total reaction cross sections, and angular correlation parameters up to 60 degrees agree with experiment.

[1]  A. Stelbovics,et al.  Third-order effects of electron-hydrogen scattering , 1983 .

[2]  R. Roychoudhury,et al.  Elastic and inelastic scattering of electrons by atomic hydrogen at intermediate energies in a coupled-channel second-order potential model , 1982 .

[3]  P. Burke,et al.  Scattering amplitudes and orientation and alignment for 1s-2p excitation of hydrogen , 1982 .

[4]  A. Stelbovics,et al.  Electron-hydrogen elastic scattering in intermediate energies , 1982 .

[5]  I. Mccarthy,et al.  Intermediate-energy Electron Scattering by Atomic Hydrogen , 1982 .

[6]  A. Stelbovics,et al.  The polarisation potential in electron-atom scattering , 1981 .

[7]  B. Bransden,et al.  A second-order potential for the elastic scattering of electrons by atomic hydrogen , 1981 .

[8]  W. Fon,et al.  Elastic scattering of electrons by atomic hydrogen at intermediate energies , 1981 .

[9]  A. Stelbovics,et al.  Analytic approximations for integrated electron-atom excitations , 1981 .

[10]  A. Stelbovics,et al.  Continuum in the atomic optical model , 1980 .

[11]  H. Q. Porter,et al.  Electron-photon angular correlation measurements for excitation of the 2P state of hydrogen at 55 and 100 eV , 1980 .

[12]  M. Mcdowell,et al.  Total reaction cross sections in the atomic coupled-channels optical model , 1979 .

[13]  B. Bransden,et al.  Electron scattering by atoms at intermediate energies II. Theoretical and experimental data for light atoms , 1978 .

[14]  R. Wagenaar,et al.  Numerical study of the dispersion relation for e--H scattering , 1977 .

[15]  F. J. Heer,et al.  Elastic scattering of electrons by molecular and atomic hydrogen , 1977 .

[16]  W. Fon,et al.  The 1s-2s and 1s-2p excitation of atomic hydrogen by electron impact , 1976 .

[17]  J. F. Williams.  Electron scattering from atomic hydrogen. III. Absolute differential cross sections for elastic scattering of electrons of energies from 20 to 680 eV , 1975 .

[18]  J. F. Williams,et al.  Electron scattering from atomic hydrogen. I. Differential cross sections for excitation of the n = 2 states , 1975 .

[19]  J. Callaway,et al.  Scattering of electrons by hydrogen atoms at intermediate energies , 1973 .

[20]  W. Ott,et al.  Excitation of Atomic Hydrogen to the Metastable 2^2S1/2 State by Electron Impact , 1970 .

[21]  D. Cox,et al.  Electron Impact Excitation of Hydrogen Lyman- α Radiation. , 1968, Journal of research of the National Bureau of Standards. Section A, Physics and chemistry.

[22]  R. Bonham.  Inelastic Scattering from Atoms at Medium Energies. I. Bound States , 1962 .