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For the radial motion of massive particles with large angular momenta in Schwarzschild geometry and that of massive charged particles with large
angular momenta or energy in a particular range in Reissner-Nordstroem geometry, there exist classically forbidden regions on the outside of
the respective event horizons which scatter certain in-falling geodesics or screen some of the black holes' evaporation by reflecting the emitted
particles back into the black holes. Quantum tunneling across this forbidden regions is studied.
Prodanov, E. (2014) Evaporation Screening, Scattering, and Quantum Tunneling Near the Horizons of Schwarzschild and Reissner-Nordstroem Black Holes, Class. Quantum Grav. 31 (2014) 105013. doi: 10.21427/zf24-9065