Calculations of positronium-atom scattering using a spherical cavity
نویسندگان
چکیده
منابع مشابه
radiative absorptivity calculations of a spherical cavity
this paper investigates the radiative absorptivity of a spherical cavity by using monte carlo techniques. several parameters such as the angle of incoming radiation which inters the cavity for both diffuse wall cavity and specular wall cavity has been investigated. the absorptivity of a spherical cavity has been calculated and compared with the exact values when the angle of incoming radiation...
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We employ the impulse approximation for a description of positronium-atom scattering. Our analysis and calculations of Ps-Kr and Ps-Ar collisions provide a theoretical explanation of the similarity between the cross sections for positronium scattering and electron scattering for a range of atomic and molecular targets observed by S. J. Brawley et al. [Science 330, 789 (2010)].
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to lead to the correct result for the other three. The present model, which is constructed so as to reproduce the Ps-H resonance at 4.01 eV, automatically yields a Ps-H bound state at −1.05 eV which compares well with the accurate value of −1.067 eV. The model leads to a singlet scattering length of 3.72a0 and effective range of 1.67a0, whereas the correlations suggest the precise values of 3.5...
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We present a variational basis-set calculational scheme for elastic scattering of positronium atom by helium atom in S wave and apply it to the calculation of the scattering length. Highly correlated trial functions with appropriate symmetry are used in this calculation. We report numerical result for the scattering length in atomic unit: (1.0 ± 0.1)a0. This corresponds to a zero-energy elastic...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2018
ISSN: 2469-9926,2469-9934
DOI: 10.1103/physreva.97.012706