
TY  - JOUR
A1  - Mitroy, Jim 
A1  - Ratnavelu, Kurunathan 
T1  - Close Coupling Theory of Positron Scattering from Alkali Atoms
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1994
VL  - 47
IS  - 6
SP  - 721
EP  - 742
KW  - 
UR  - https://doi.org/10.1071/PH940721 
N2  - The close coupling equatious for positron-alkali atom scattering are written as a set of coupled momentum-space Lippmann-Schwinger equations. The alkali atom is represented by a frozen-core model based upon the Hartree-Fock approximation. The interaction between the positronium and the residual ion is modified by the inclusion of a core potential. Similarly, a core term is present in the interaction describing the rearrangement process. Close coupling calculations of positron scattering from sodium are performed in a model containing multiple sodium (3s, 3p, 4s, 3d, 4p) and positronium (Is, 2s, 2p) states. Cross sections are reported for an energy range from threshold to 50·eV; the total cross sections are in agreement with experimental data. 
ER  -

