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• W2772080413 abstract "Positronium (Ps) scattering by noble-gas atoms (He, Ne, Ar, Kr, and Xe) is studied in the frozen-target approximation and with inclusion of the van der Waals interaction. Single-particle electron and positron states in the field of the target atom are calculated, with the system enclosed by a hard spherical wall. The two-particle Ps wave function is expanded in these states, and the Hamiltonian matrix is diagonalized, giving the Ps energy levels in the cavity. Scattering phase shifts, scattering lengths, and cross sections are extracted from these energies and compared with existing calculations and experimental data. Analysis of the effect of the van der Waals interaction shows that it cannot explain the recent experimental data of Brawley et al. for Ar and Xe [Phys. Rev. Lett. 115, 223201 (2015)]." @default.
• W2772080413 created "2017-12-22" @default.
• W2772080413 creator A5014277849 @default.
• W2772080413 creator A5027221780 @default.
• W2772080413 date "2018-01-22" @default.
• W2772080413 modified "2023-09-26" @default.
• W2772080413 title "Calculations of positronium-atom scattering using a spherical cavity" @default.
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• W2772080413 doi "https://doi.org/10.1103/physreva.97.012706" @default.
• W2772080413 hasPublicationYear "2018" @default.
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