Abstract
The relativistic polarized orbital theory of the elastic electron and positron scattering from closed-shell atoms is formulated in a similar way to that used in the non-relativistic case. The scattering equations involving the relativistic polarization potential for both types of projectile and also the exchange-polarization terms for the electron projectile are derived. The relativistic formula for the positron-atomic-electron annihilation coefficient Zeff is presented.
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