The motivation for the work reported is to improve the resonant charge transfer cross-sections to precision of experimental data of ion mobility in parent cases at weak electric field ~1%. We are particularly interested here with ions He, Ne, Ar, Kr, Xe, Rb, Cs, Hg.
Analytical expressions for cross sections as a function of relative energy are , in table are presented approximation parameters. Cross sections in unit 10-16 cm2, kinetic energy at eV, eV.
Ar+ - Ar
Hg+ - Hg
The author is thankful to the Russian Foundation for Basic Research (project 05-02-16796-а, 06-02-17520-а, 06-08-01554-а) and the Netherlands World Organization (project 047.016.020) for financial support.