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- W4327720986 abstract "The total cross section of positronium (Ps) scattering from molecular oxygen has been measured in the velocity range 0.27--1.50 a.u. (energy range 2--61 eV) and has been found to be close to the corresponding equivelocity electron cross section above 0.87 a.u. $(20phantom{rule{0.16em}{0ex}}mathrm{eV})$, as previously found by Brawley et al., [Science 330, 789 (2010)]. However, below this value the cross section for positronium is observed to exceed that for electrons by up to a factor of 4 at the lowest energy. Measurements are compared to the predictions of low-energy resonant peaks in the elastic-scattering cross section calculated within a free-electron-gas model refined by applying corrections to the correlation energy for the interaction between Ps and the electron gas. Additionally, cross sections for ${mathrm{O}}_{2}^{ensuremath{-}}$ formation and positronium breakup have been calculated using a classical-trajectory Monte Carlo approach. Comparisons are made with earlier calculations and discussed in terms of both experimental and theoretical uncertainties." @default.
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- W4327720986 date "2023-02-15" @default.
- W4327720986 modified "2023-10-14" @default.
- W4327720986 title "Low-energy positronium scattering from <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>" @default.
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- W4327720986 doi "https://doi.org/10.1103/physreva.107.022809" @default.
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