For 10 points, name this phenomenon in which a particle crosses a potential barrier of energy greater than its own energy, a process that is not classically allowed.
In the WKB approximation, the probability of this process is given by e to the minus integral of the wave number between turning points, all over the square of one plus one-fourth the same exponential. The preformation probability times the rebound frequency times the probability of this process gives the rate of alpha decay in the Gamow [GAM-off] model. Because the wavefunction decays exponentially in regions of high potential, the wave function amplitude is in general non-zero outside of finite potential barriers, which explains this process. The transmission coefficient gives the probability of this process. For 10 points, name this phenomenon in which a particle crosses a potential barrier of energy greater than its own energy, a process that is not classically allowed.
In the WKB approximation, the probability of this process is given by e to the minus integral of the wave number between turning points, all over the square of one plus one-fourth the same exponential.
quantum {tunneling}