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dc.contributor.authorUtamuratov, R.
dc.contributor.authorFursa, Dmitry
dc.contributor.authorKadyrov, Alisher
dc.contributor.authorBray, I.
dc.identifier.citationUtamuratov, R. and Fursa, D. and Kadyrov, A. and Bray, I. 2019. Configuration space method to calculate rearrangement matrix elements. Computer Physics Communications. 239: pp. 64-71.

A new method has been developed for calculating rearrangement matrix elements within the two-centre convergent close-coupling theory and applied to Ps formation in positron–atom collisions. The method utilises partial wave expansion of the Ps wavefunction that separates dependencies on coordinates of electron and positron. Resulting expressions contain slowly converging series which have been accelerated with use of the Euler–Wijngaarden transformation. The integrals in the method are free of the Coulomb singularity that appears in previously used momentum-space methods and therefore more straightforward to apply to complex and charged targets. The results are compared with the existing benchmark calculations for positron scattering on H and He+ targets.

dc.publisherElsevier BV
dc.titleConfiguration space method to calculate rearrangement matrix elements
dc.typeJournal Article
dcterms.source.titleComputer Physics Communications
curtin.departmentSchool of Electrical Engineering, Computing and Mathematical Science (EECMS)
curtin.accessStatusFulltext not available

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