INVESTIGADORES
GASANEO Gustavo
artículos
Título:
Solving three-body-breakup problems with outgoing-flux asymptotic conditions
Autor/es:
J. M. RANDAZZO, F. BUEZAS, A. L. FRAPICCINI, F. D. COLAVECCHIA,AND G GASANEO
Revista:
PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2011 vol. 84 p. 527151 - 5271512
ISSN:
1050-2947
Resumen:
An analytically solvable three-body collision system (s wave) model is used to test two different theoretical
methods. The first one is a configuration interaction expansion of the scattering wave function using a basis
set of Generalized Sturmian Functions (GSF) with purely outgoing flux (CISF), introduced recently in A. L.
Frapicinni, J. M. Randazzo, G. Gasaneo, and F. D. Colavecchia [J. Phys. B: At. Mol. Opt. Phys. 43, 101001
(2010)]. The second one is a finite element method (FEM) calculation performed with a commercial code. Both
methods are employed to analyze different ways of modeling the asymptotic behavior of the wave function in
finite computational domains. The asymptotes can be simulated very accurately by choosing hyperspherical or
rectangular contours with the FEM software. In contrast, the CISF method can be defined both in an infinite
domain or within a confined region in space. We found that the hyperspherical (rectangular) FEM calculation and
the infinite domain (confined) CISF evaluation are equivalent. Finally, we apply these models to the Temkin-Poet
approach of hydrogen ionization.