Positron Tunnelling through the Coulomb Barrier of Superheavy Nuclei

Details Positron Tunnelling through the Coulomb Barrier of Superheavy Nuclei Positron Tunnelling through the Coulomb Barrier of Superheavy Nuclei

1999-12-31

arxiv.org/abs/nucl-th/9912076v2

Phys.Lett. B474 (2000) 1-6

Physics

Nuclear Physics

Nuclear Theory

3 figures, to be published in Physics Letters B

Scientific paper

10.1016/S0370-2693(00)00016-2

We study beams of medium-energy electrons and positrons which obey the Dirac equation and scatter from nuclei with $Z > 100.$ 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 $Z \approx 184.$ 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.

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