TARGET DEPENDENCE OF SINGLE-ELECTRON-CAPTURE CROSS SECTIONS FOR SLOW Be, B, C, Fe, Ni, AND W IONS COLLIDING WITH ATOMIC AND MOLECULAR TARGETS

摘要

Single-electron-capture cross sections σ_(10) for W+ projectile ions onAr and Kr atomic gas targets at 10 keV (55 eV/u) and on H_2, D_2, CH_4, C_2H_6, and C_3H_8 molecular gas targets at between 5.0 and 10 keV (27 and 55 eV/u) were experimentally derived for the first time. With our published single-electron-capture cross sections σ_(q q-1) for Be~(q+), B~(q+), C~(q+), Fe~(q+), Ni~(q+), and W~(q+) (q = 1 for Fe; q = 1,2 for the others) ions in low energy, an attempt was made to draw scaling behavior of single-electron-capture cross sections for such slow low-q ions on target species. Established scaling formulas are found to reproduce the measured cross sections generally within a magnitude and with higher precision for specific initial charge state and target species.