Microscopic study of the He2-SF6 trimers

Details Microscopic study of the He2-SF6 trimers Microscopic study of the He2-SF6 trimers

2003-09-25

arxiv.org/abs/physics/0309103v1

Physics

Atomic and Molecular Clusters

17 pages, 5 figures. Submitted to PRA

Scientific paper

10.1103/PhysRevA.68.053205

The He2-SF6 trimers, in their different He isotopic combinations, are studied both in the framework of the correlated Jastrow approach and of the Correlated Hyperspherical Harmonics expansion method. The energetics and structure of the He-SF6 dimers are analyzed, and the existence of a characteristic rotational band in the excitation spectrum is discussed, as well as the isotopic differences. The binding energies and the spatial properties of the trimers, in their ground and lowest lying excited states, obtained by the Jastrow ansatz are in excellent agreement with the results of the converged CHH expansion. The introduction of the He-He correlation makes all trimers bound by largely suppressing the short range He-He repulsion. The structural properties of the trimers are qualitatively explained in terms of the shape of the interactions, Pauli principle and masses of the constituents.

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