Cross sections of electron capture and electron capture with ionization of argon atoms by fast $^3$He$^{2+}$ ions at various impact parameters

The absolute differential cross sections of scattering of fast particles formed in processes with capture of one or two electrons from Ar atoms have been measured for 6-keV He$^{2+}$ ions in the interval of scattering angles within 0$^\circ$–2.5$^\circ$. The cross sections of electron capture and electron capture with ionization have been determined as functions of the impact parameter. The probabilities of these processes are compared to the distribution of electron density in various shells of target atoms. Applicability of the models of screened Coulomb interaction potentials to description of the scattering of recharged particles is assessed.