56 research outputs found
Semirelativistic excitation of atomic hydrogen by electron impact
In the framework of the first Born approximation, we present a
semirelativistic theoretical study of the inelastic excitation
() of hydrogen atom by electronic impact. The
incident and scattered electrons are described by a free Dirac spinor and the
hydrogen atom target is described by the Darwin wave function. Relativistic and
spin effects are examined in the relativistic regime. A detailed study has been
devoted to the nonrelativistic regime as well as the moderate relativistic
regime. Some aspects of this dependence as well as the dynamic behavior of the
DCS in the relativistic regime have been addressed.Comment: one latex file and 6 figure
Comment on Mott Scattering in strong Laser Field
The first differential cross section for Mott scattering of a Dirac-Volkov
electron is reviewed. The expression (26) derived by Szymanowski et al.
[Physical Review A {\bf 56}, 3846,(1997)] is corrected. In particular, we
disagree with the expression of they obtained and
we give the exact coefficients multiplying the various Bessel functions
appearing in the scattering differential cross section.Comment: 16 pages, LaTex, added reference for section 3, corrected some
typosReport no: LPHEA 02-0
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