Using the AMOS Gateway for Low-Energy Electron-Helium Scattering

Previously, variational methods have been employed to determine accurate phase shifts for electron-helium scattering [1-4]. Recently, the B-Spline Atomic R-matrix (BSR) method has been employed to compute the S-, P-, and D-wave phase shifts for electron-helium scattering [5]. Very recently we have used the BSR suite of codes on the Atomic, Molecular, and Optical Science Gateway (AMOS Gateway) [6] to compute for the first four partial waves the K-matrices, T-matrices and the summed elastic cross section for low-energy electron-helium scattering. We plan to show a comparison of the phase shifts that we compute using the K-matrices from the AMOS Gateway with the earlier variational and BSR results. Furthermore, we plan to compare various scattering cross sections that we can compute with our determined phase shifts with corresponding cross sections available in the literature.

[1] A. L. Sinfailam and R. K. Nesbet, Phys. Rev. A 6, 2118 (1972).

[2] A. L. Sinfailam and R. K. Nesbet, Phys. Rev. A 19, 1808 (1979).

[3] R. K. Nesbet, Phys. Rev. A 20, 58 (1979).

[4] J. -Y. Wan, M. -S. Wu, J. -Y. Zang, and Z. – C. Yan, Phys. Rev. A 103, 042814 (2021)

[5] R. P. McEachran, K. R. Hamilton and K. Bartschat, Atoms 9, 82 (2021)

[6] https://amos-gateway.org/ (date accessed 1/14/2026)