Capture of K-shell electrons by alpha-particles in alpha-decay of superheavy nuclei: I. Charge transfer in collisions of alpha-particles with He+(1s) ions

摘要

We consider a process in which alpha-particles after alpha-decay ionize K-shell of daughter atoms and capture electrons. We first have performed similar calculations for collisions of alpha-particles with He+(1s) ions. This charge transfer process is studied for the collision energy region 0.04-400 keV. The transition amplitudes are calculated in the impact parameter approximation with the use of the close coupling equations method for a basis consisting of eight molecular states. Total and partial charge-transfer cross sections to the 1s and, for the first time, to the 2s and 2p (0), 2p (+/- 1) states of the He+ ion are obtained. Angular differential cross sections for the elastic scattering and charge-transfer processes are calculated in the eikonal approximation for a wide range of scattering angles for the collision energy of 1 keV. Results of calculations are in an excellent agreement with experimental data.