The simplest model that predicts this effect is a one-dimensional finite square potential well.
This effect occurs in a vacuum under the Sposita potential, but not under the HFDHE2 ["H-F-D-H-E-2"] potential. Sandouqa et al. used the Galitskii-Migdal-Feynman formalism to analyze this effect's occurrence in liquid helium-3. Vahedi et al. applied the generalized uncertainty principle to show that this effect causes a shift in the transmission resonance wavenumber. An experiment commonly used to demonstrate this effect includes parameters such as the cathode space charge factor and the ratio of the plate angle to the shield angle; that experiment features a 2D21 ["2-D-2-1"] thyratron. The simplest model that predicts this effect is a one-dimensional finite square potential well. In the standard example of this effect, a kinetic energy of approximately 0.7 electronvolts results in a minimum probability of collision with xenon, which cannot be explained by classical physics. For 10 points, name this quantum mechanical effect involving the scattering of electrons by the atoms of a noble gas.
This effect occurs in a vacuum under the Sposita potential, but not under the HFDHE2
Ramsauer-Townsend effect [accept either underlined name]