Dispersion coefficients for interactions among H, Li, Na, K atoms with Debye–Hückel potentials

Abstract

The effect of Debye–Hückel screening on the dispersion coefficients C6, C8, C10 for interactions among H, Li, Na and K atoms has been investigated using the symplectic algorithm. The C6, C8, C10 coefficients for interactions among alkali-metal atoms along with the dipole, quadrupole and octupole polarizabilities of K atom for various screening parameters are reported for the first time in the literature. In free-atomic cases, our results are comparable with available theoretical and experimental results.