Variational calculation of positronium-helium-atom scattering length
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Resumo
A basis-set calculation scheme for S-waves Ps-He elastic scattering below the lowest inelastic threshold was formulated using a variational expression for the transition matrix. The scheme was illustrated numerically by calculating the scattering length in the electronic doublet state: a=1.0±0.1 a.u.
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Atoms, Electrons, Fermions, Green's function, Ground state, Helium, Integration, Matrix algebra, Nonlinear equations, Polynomials, Vectors, Elastic scattering, Legendre polynomials, Positronium, Schrodinger equation, Schwinger variational method, Transition matrix, Wave functions, Zero-energy elastic cross section, Scattering
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Physical Review A. Atomic, Molecular, and Optical Physics, v. 64, n. 2, 2001.
