Abstract
We have investigated positron scattering from the alkali atoms lithium, sodium, potassium and rubidium, focusing on the calculation of differential cross sections for elastic scattering and impact excitation. The results obtained with the two-state and five-state close-coupling method as well as the first-order distorted wave Born approximation are compared with each other and with some selected results for electron scattering. Numerical problems due to lack of, or numerically inaccurate, calculation of partial waves with large angular momenta are solved through semi-empirical fitting/extrapolation procedures.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
S.J. Ward, M. Horbatsch, R.P. McEachran and A.D. Stauffer, J. Phys. B 21 (1988) L 611; 22 (1988) 1845, 3763.
R.P. McEachran, M. Horbatsch and A.D. Stauffer, J. Phys. B 24 (1991) 1107.
K. Bartschat, R.P. McEachran and A.D. Stauffer, Hyp. Int. 73 (1992) 99.
K.M. De Vries, K. Bartschat, R.P. McEachran and A.D. Stauffer, J. Phys. B 25 (1992) L 653.
D.H. Madison and K. Bartschat, The distorted wave method for elastic scattering and excitation, in:Computational A tomic Physics, ed. K. Bartschat (Springer, Berlin), in press.
R.P. McEachran, The close-coupling approximation, in:Computational Atomic Physics, ed. K. Bartschat (Springer, Berlin), in press.
R.P. McEachran and M. Cohen, J. Phys. B 16 (1983) 3125.
R.P. McEachran and A.D. Stauffer, J. Phys. B 23 (1990) 4605.
L. Rosenberg, T.F. O'Malley and L. Spruch, J. Math. Phys 2 (1961) 491.
M.J. Seaton, Proc. Phys. Soc. 77 (1961) 174.
W.L. van Wyngaarden and H.R.J. Walters, J. Phys. B 19 (1986) 1817, 1827.
M.P. Scott, T.T. Scholtz, H.R.J. Walters and P.G. Burke, J. Phys. B 22 (1989) 3055.
C.T. Wheelan, J. Phys. B 19 (1986) 2343, 2355.
A. Burgess and C.T. Wheelan, Comput. Phys. Commun. 47 (1987) 295.
I. Bray and I.E. McCarthy, Phys. Rev. A 47 (1993) 317.
D.R. Hartree, Proc. Camb. Phil. Soc. 24 (1928) 111.
D.H. Madison, K. Bartschat and R.P. McEachran, J. Phys. B 25 (1992) 5199.
I. Bray, private communication (1993).
I. Bray and A. Stelbovicz, Phys. Rev. A 46 (1992) 6995.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bartschat, K., De Vries, K.M., McEachran, R.P. et al. Differential cross sections for elastic and inelastic positron scattering from alkali atoms. Hyperfine Interact 89, 57–69 (1994). https://doi.org/10.1007/BF02064496
Issue Date:
DOI: https://doi.org/10.1007/BF02064496