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Binding weakly interacting partners: a study of Ca-He 2 and its isotopomers

AuthorsLópez Durán, David; Rodríguez-Cantano, Rocío ; González-Lezana, Tomás ; Delgado Barrio, Gerardo ; Villarreal, Pablo ; Gianturco, Franco Antonio
Issue Date26-Jul-2012
CitationEuropean Physical Journal D 66 (2012)
AbstractWe present in this paper binding energies and structures of non-rotating weakly bound 40Ca- nHe 2 triatomic complexes. Two kind of systems are discussed: bosonic (n = 4) and fermionic (n = 3) complexes at its singlet state (nuclear spin S = 0). Three different coordinate systems and methods have been used to solve the relevant Schrödinger equation: variational calculations (1) using satellite coordinates and a discrete variable representation of radial functions; (2) employing pair coordinates and products of distributed Gaussian functions as basis functions; and (3) variational/Diffusion Monte Carlo calculations in Cartesian coordinates. The potential energy surface is represented as the addition of pair potentials. By using the most realistic interaction between each pair of particles, present results from the three methods are in fair agreement. Only two bound states for each system are found in our computations. © EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2012.
Identifiersdoi: 10.1140/epjd/e2012-30202-6
issn: 1434-6060
Appears in Collections:(CFMAC-IFF) Artículos
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