Abstract
For pt.II see ibid., vol.14, p.559 (1981). The elastic scattering of electrons by krypton, xenon and radon atoms in the low-energy region up to 30 eV has been investigated. Direct and indirect relativistic effects are taken into account. The increase in the contribution of the direct effect with the nuclear charge of the target has been studied. Polarisation is included using a procedure based on the Pople-Schofield approximation. Partial-wave phaseshifts with l=0-8 are presented. The calculation predicts results which are in quite good agreement with measurements on total, momentum-transfer and elastic differential cross sections for krypton and xenon. There is poor agreement between theory and experiment on spin polarisation for xenon at energies of 25 and 30 eV. The present work indicates that radon exhibits the Ramsauer-Townsend effect also.
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