Positron Tunnelling through the Coulomb Barrier of Superheavy Nuclei
arXiv:nucl-th/9912076 · doi:10.1016/S0370-2693(00)00016-2
Abstract
We study beams of medium-energy electrons and positrons which obey the Dirac equation and scatter from nuclei with At small distances the potential is modelled to be that of a charged sphere. A large peak is found in the probability of positron penetration to the origin for This may be understood as an example of Klein tunnelling through the Coulomb barrier: it is the analogue of the Klein Paradox for the Coulomb potential.
3 figures, to be published in Physics Letters B