Experimental study of single, double, and multiple electron capture in slow N-15(7+)+Ne collisions using recoil-ion momentum spectroscopy - art. no. 012715

Single, double, triple, quadruple, and quintuple capture of electrons in N- 15(7+) + Ne collision at the energy of 105 keV have been investigated using recoil-ion momentum spectroscopy. Relative cross sections, stabilization r atios, ratios between single- and multiple-electron capture, along with the branching ratios of subprocesses involved in multiple capture, have been o btained and compared with calculations by the extended classical over-barri er model [A. Niehaus, J. Phys. B 19, 2925 (1986)] and the semiempirical sca ling laws [N. Selberg et nl., Phys. Rev. A 54, 4127 (1989)]. For single cap ture, it state relative populations and projectile scattering angle distrib utions are given. In the case of double capture, we find the autoionizing d ouble capture dominates and populates the symmetric N5+(3l3l') and near-sym metric N5+(3l4l') state, while the true double capture mainly gives rise to N5+(2lnl') (n>2) configurations. The relative cross sections and stabiliza tion ratios far double electron capture are evaluated. In the more than two -electrons capture, we have obtained stabilization ratios and branching rat ios of different subprocesses. The configurations populated by more than tw o-electron captures have been identified. Our results also show that the el ectron-electron correlation is important in multiple electron capture.