Magnetic field effects on electron capture processes by highly charged ions: collisions of B4+ ions with H atoms

The electron capture processes in collision of highly charged ions with neutral atoms in a strong magnetic field are investigated in the case of arbitrary field direction. A semiclassical molecular-orbital close-coupling method is employed. The phase factors arising from the electron translation factor and the gauge transformation are included. We apply this method to the singlet (B4+ + H) system which have been investigated previously by us only for the field direction being along with the incident velocity vector. The total cross section averaged over field direction increases with field strength. When the field direction is perpendicular to the collision plane, the field effects become maximum.