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Quantum Mechanical WKB Barrier Approximation

The WKB (Wentzel-Kramers-Brillouin) applet shows how the transmission coefficient through a barrier of variable potential, shown in blue, can be approximated using a succession of square barriers. The transmission by each square element is shown. The number of square approximations can be altered. Energies in eV and dimensions in Å are relevant to electrons. The same qualitative effect with suitable scaling applies to alpha particles at energies MeV.

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References

 The applet and web pages were designed by Gary Skinner, as part of a project sponsored by LSTN

 

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