Elastic electron scattering from C 60 and Ar@C 60 is studied using the Dirac partial wave methodology. The endohedral environment is approximated as an atom trapped in an attractive spherically symmetric potential employing two model potentials: (A) hard annular square well (ASW) and (B) diffused Gaussian annular square well (GASW). The objective of the present work is twofold; the first focus is to study the effect of charge transfer from encaged Ar to C 60 shell on e-Ar@C 60 scattering. Various well depths for model potentials are employed in order to investigate charge transfer and its impact on scattering dynamics. The present work validates the earlier assumption of Dolmatov et al.

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Elastic electron scattering from Ar@C 60 z+ (z = 1, 6) is investigated by employing Dirac partial-wave analysis within the static-exchange model. The C 60 cage is approximated using compact annular square well (ASW) and diffuse Gaussian annular square well (GASW) con nement potentials. In order to investigate the roles of Ar z+ and C 60 z+ targets in the e-Ar@C 60 z+ collision, the scattering dynamics of individual targets is also presented. A quantitative analysis of the total cross-section (TCS) and the differential cross-section (DCS) is presented, highlighting the effects of the charge state andpolarizability of the target. The rami cations of compact versus diffuse con nement potentials in modeling electron scattering with endohedral targets are also presented. This work concludes that the long-range Coulomb interaction dominates the elastic scattering process, compared to the short-range contributions, which makes the TCS independent of the target details, and only sensitive to the charge state.

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From a macroscopic point of view, the C60 and the interaction offered by it is considered spherical because of its symmetry. However, the C60 is formed of hexagonal and pentagonal rings of Carbons. Therefore, on a microscopic level, the interaction potential offered in the elastic scattering of projectiles from the C60 is anisotropic. Elastic scattering of Hydrogen atom from the C60 with the interaction taken to be anisotropic is discussed in the present work. The complex radial and angular dependence of H-C60 interaction is calculated using the Density Functional Theory. The scattering resonances are seen to be modified to significant extent in comparison with the isotropic scattering case. However, the parameters of the non-resonant scattering are mostly unaffected due to the anisotropic effects.