Bulletin of the American Physical Society
53rd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 67, Number 7
Monday–Friday, May 30–June 3 2022; Orlando, Florida
Session F01: Poster Session I (4:30-6:30pm, EDT)
4:30 PM,
Tuesday, May 31, 2022
Room: Grand Ballroom C
Abstract: F01.00021 : 1,3S and 1,3P electron-positronium scattering*
Presenter:
Sandra J Ward Quintanilla
(University of North Texas)
Authors:
Sandra J Ward Quintanilla
(University of North Texas)
William J Mitchell
(University of North Texas)
S. J. Ward and William Mitchell, University of North Texas
Using the inverse Kohn variational method and elaborate trial wave functions we have determined 1,3S and 1,3P phase shifts for electron-positronium scattering. These new calculations are an extension of prior work [1-3]. We have re-optimized the nonlinear parameters from the earlier calculations and, for most of the energy range for each partial wave, we have increased the number of linear parameters in the trial wave function. Furthermore, we have accurately determined parameters for 1S, 1P and 3P resonances. We plan to show a comparison our results with the prior results [1-3].
[1] S. J. Ward, J. W. Humberston and M. R. C. McDowell, J. Phys. B 18, L525 (1985).
[2] S. J. Ward, J. W. Humberston and M. R. C. McDowell, J. Phys. B 30, 127 (1987).
[3] S. J. Ward, Thesis, University of London, Unpublished, 1986.
*S. J. W. gratefully acknowledges support from the NSF under Grant No. PHYS-1707792
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