THE EXCITATION OF AN INDEPENDENT-PARTICLE GAS BY A TIME-DEPENDENT POTENTIAL WELL .2.

A systematic comparison is carried out between quantal and classical c omputer simulations of the excitation of independent particles in a ti me-dependent potential well undergoing one cycle of oscillation. Eleve n values of the diffuseness, up to 25 values of the oscillation freque ncy, and five Legendre polynomial deformations P-2, P-3, P-4, P-5, P-6 were examined. Oscillations around the spherical shape as well as aro und a P-3 deformed shape were considered. The results are compared wit h the one-body dissipation theory in the form of the wall formula, inc luding corrections for the heating up of the gas, the diffuseness of t he surface, the wave-mechanical suppression of dissipation and the red uction in the effective volume available to a quantal gas in a contain er whose diffuseness is small compared to the particle wavelengths. (C ) 1997 Published by Elsevier Science B.V.