Variational calculation of positronium-helium-atom scattering length

Abstract

We present a variational basis-set calculational scheme for elastic scattering of positronium atom by helium atom in S wave and apply it to the calculation of the scattering length. Highly correlated trial functions with appropriate symmetry are used in this calculation. We report numerical result for the scattering length in atomic unit: $(1.0\pm 0.1)a_0$. This corresponds to a zero-energy elastic cross section of $(4.0\pm 0.8)\pi a_0^2$.

16 pages, 1 figure

References in corpus (3)

• Positronium atom scattering by H_2 in a coupled-channel framework
• Convergent variational calculation of positronium-hydrogen-atom scattering lengths
• Differential cross sections for elastic and inelastic positronium-hydrogen-atom scattering

Cited by in corpus (3)

• An extended class of L2-series solutions of the wave equation
• Calculations of positronium-atom scattering using a spherical cavity
• Positronium scattering by atoms and molecules at low energies