Shapes of 3He clusters.

Abstract

It has been established that a dominant factor controllingthe ground-state properties and shapes of disparate finitefermion systems ~such as nuclei and simple-metal clusters,whose nature of bonding and cohesion are of very differentorigins with widely differing characteristic energetic andspatial scales! are the shell effects resulting from level de-generacies in conjunction with the Pauli principle ~e.g.,for nuclei see Ref. 1; for simple metal clusters see Refs. 2and 3!.In contrast to heavier noble-gas clusters,