engleski

Ground-state properties of small mixed helium and spin-polarized tritium clusters

We report the results on the ground-state energy and structural properties of small clusters consisting of up to 4 spin-polarized tritium (spT) and 8 He-4 atoms. Their small mass and weak attractive parts of interaction potentials makes them very weakly bound, with some at the limits of stability. The smallest bound clusters can be classified as quantum halos, as a consequence of their large spatial extent. Our results have been obtained using very well know 4He-4He and spT-spT interaction potentials. Since several 4He-spT interatomic potentials appear in the literature, the effects of the chosen form on both energy and structural properties have been thoroughly investigated. All calculations have been performed using variational and diffusion Monte Carlo methods. Present calculations for 4He-spT clusters are compared with existing results for 4He-3He clusters because both types of clusters have essentially the same mass, but differ in the interaction potentials and the statistics.

small mixed clusters; ground-state energy; structural properties; helium; spin-polarized

nije evidentirano