Low-energy positron–helium convergent close coupling calculations

Autor:	Andris T. Stelbovics, Igor Bray, Huayou Wu, Dmitry V. Fursa
Rok vydání:	2003
Předmět:	Physics Scattering Phase (waves) chemistry.chemical_element Condensed Matter Physics Atomic and Molecular Physics and Optics Positronium Low energy Positron chemistry Laguerre polynomials Atomic physics Close coupling Helium
Zdroj:	Journal of Physics B: Atomic, Molecular and Optical Physics. 37:L1-L6
ISSN:	1361-6455 0953-4075
DOI:	10.1088/0953-4075/37/1/l01
Popis:	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.?A?17?1600?8) and Mizogawa et al (1985 Phys.?Rev.?A 31 2171?9).
Databáze:	OpenAIRE
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