The differential elastic-scattering cross sections (DCS) were calculated using the relativistic Dirac partial wave analysis, as described by Walker [1]. The scattering potential was obtained from the self-consistent Dirac-Hartree-Fock electron density for free atoms [2] with the local exchange potential of Furness and McCarthy [3]. The numerical calculations were performed with the algorithm described by Salvat and Mayol [4].

- [1] D.W. Walker, Advances in Physics 20 (1971) 257-323.
- [2] J.P. Desclaux, Computer Physics Communications 9 (1975) 31-45; Erratum, ibid 13 (1977) 71.
- [3] J.B. Furness and I.E. McCarthy, J. Phys. B, At. Mol. Phys. 6 (1973) 2280-2291.