From sum rules to RPA: 2. 3 He droplets

We investigate the excitation spectra of closed‐shell 3 He droplets using a flexible formulation of the RPA which has been presented in preceeding papers. The calculations are based on an energy functional which thorougly employs finite‐range interactions. We compare the results for different stages in a hierarchy of approximations to the full RPA. We furthermore discuss the consequences of taking the zero‐range limit of the present energy functional, i.e. of using Skyrme‐type interactions.