Physics header

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.

Hidden features


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


Physics virtual library