We present calculations of the differential, integrated elastic, and total cross sections for positrons scattered from alkali-metal atoms. The energy of the positrons ranges from 10 eV to 1000 eV. In the calculations we use parameter-free model potentials for the correlation-polarization and absorption interactions. The absorption potential used for positron scattering is based on a quasifree model that we recently proposed and tested for the noble-gas targets. For positron–alkali-metal scattering the model potentials have produced reliable scattering cross sections over the extended range of impact energies when compared against the available experimental data.
Reid DD & Wadehra JM. Intermediate- to high-energy positrons scattered by alkali-metal atoms. Phys. Rev. A. 1998;57(4);2583-89. doi: 10.1103/PhysRevA.57.2583