Spin-resolved superelastic electron scattering from laser-excited chromium atoms
G F Hanne; J J McClelland; R E Scholten; R J Celotta; G F Hanne; Phys. Inst., Munster Univ., Germany; J J McClelland; Phys. Inst., Munster Univ., Germany; R E Scholten; Phys. Inst., Munster Univ., Germany; R J Celotta; Phys. Inst., Munster Univ., Germany
Журнал:
Journal of Physics B: Atomic, Molecular and Optical Physics
Дата:
1993-11-14
Аннотация:
Superelastic scattering of polarized electrons from laser-excited polarized chromium atoms (4<sup>7</sup>P<sub>4</sub><sup>o</sup>) to 4<sup>7</sup>S<sub>3</sub> transition, energy gain 2.92 eV) has been measured for total collision energies of 6.8 and 13.6 eV (0.5 and 1.0 Ryd) and scattering angles ranging from 10 degrees to 140 degrees . The orientation parameter L<sub>perpendicular to </sub> is determined both averaged over spin states, and separately for the sextet and octet total spin channels. The octet-to-sextet cross section ratio r is also determined. The chromium atom has six unpaired electrons with the configuration 3d<sup>5</sup>(<sup>6</sup>S<sub>5/2</sub>)4l (l=0, 1) for the states under investigation. The scattering data show strong orbital orientation and spin effects, which the authors attribute to the interaction between the continuum electron and the outermost 4l target electron.
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