Stability of (3)He(2)(4)He(n) and (3)He(3)(4)He(n) L=0 clusters.
We have studied the stability of mixed (3)He/(4)He clusters in L=0 states by the diffusion Monte Carlo method, employing the Tang-Toennies-Yiu He-He potential. The clusters (3)He(4)He(N) and (3)He(2)(4)He(N) are stable for N>1. The lighter atoms tend to move to the surface of the cluster. The minimum number of 4He atoms able to bind three 3He atoms in a L=0 state is nine. Two of three fermionic helium atoms stay on the surface, while the third one penetrates into the cluster.
Bressanini
Dario
D
Dipartimento di Scienze Chimiche, Fisiche e Matematiche, Universitá dell'Insubria, via Lucini 3, 22100 Como, Italy.
Morosi
Gabriele
G