Low-energy positron–helium convergent close coupling calculations
Wu, H., Bray, I., Fursa, D.V. and Stelbovics, A.T. (2003) Low-energy positron–helium convergent close coupling calculations. Journal of Physics B: Atomic, Molecular and Optical Physics, 37 (1). L1-L6.
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The convergent close coupling method has been applied to positron-helium scattering for energies below the positronium formation threshold (17.8 eV). Convergence is studied as a function of the Laguerre basis size. Rapid convergence to the accurate phase shifts given by Van Reeth and Humberston (1999 J. Phys. B: At. Mol. Opt. Phys. 32 3651-67) is demonstrated. The resultant cross sections are in excellent agreement with the experimental data of Stein et al (1978 Phys. Rev. A17 1600-8) and Mizogawa et al (1985 Phys. Rev. A 31 2171-9).
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|Publisher:||IOP Publishing Ltd|
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