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FIZIKA A 18 (2009) 3 , 133-140
 
DIFFERENTIAL SCATTERING CROSS SECTIONS FOR ELECTRON SCATTERING BY YTTERBIUM
ATOM
C. V. PANDYAa, P. M. PATELb and K. L. BALUJAc
aDepartment of Physics, M. G. Science Institute, Navarangpura,
Ahmedabad, India
bDepartment of Physics, V. P. & R. P. T. P. Science College, Vallabh
Vidyanagar, India
cDepartment of Physics and Astrophysics, University of Delhi, Delhi
110007, India
Received 7 July 2009; Accepted 7 October 2009
Online 27 November 2009
Electron scattering by ytterbium atom is studied at energies 10, 20, 40, 60
and 80 eV, by applying a parameter-free complex optical potential. The real part
of the complex optical potential includes the static potential Vst(r),
the polarization potential Vpol(r) that
consists of the short range correlation and long-range polarization effects and
Vex(r) term consisting of electron
exchange interaction which is modelled by assuming the electron charge cloud as
a free electron gas. The loss of flux into the inelastic channels is included
via a phenomenological absorption potential. Our results are compared with the
recent experimental measurements.
PACS numbers: 34.80.Bm
UDC 539.186
Keywords: electron scattering, differential scattering cross sections,
variable phase approach, complex optical potential
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