L-shell ionization accompanied by one-electron capture inCq+,Oq

One-electron capture with simultaneous ionization in Cq+, Oq+ (q=1–4)–Ar collisions

“…And when q is not changed, R k1 strongly depends on the projectile energy. In our previous studies [9] for Ne targets, the maximum of R k1 distribution has been found to be located at E max ≈ 160q 1/2 keV/u. Similarly, the present data for Ar targets also show that E max is approximately in proportion to q 1/2 , but, due to lower binding of outer electrons, E max is around 130q 1/2 keV/u smaller than that of Ne targets.…”

“…The main sources of uncertainties come from the efficiency of R-MCP detector (10%), multicollision (<3%), the uncertainty of determining the counting region in the two-dimensional spectrum (10%) and statistical errors which are within 10% for lower charge-state recoil ions. Full details of the error analysis have been given in our previous paper [9][10][11]. …”

“…A more detailed description of this experimental setup has been published elsewhere [9][10][11]. Negative carbon or oxygen ions extracted from a sputter ion source were accelerated, stripped in a gas stripper, and then accelerated again to the final energy.…”

“…C q+ , O q+ (q = 2, 3)-Ne collisions [9]. In the present work, we extend our previous method to study the production of recoil Ar k+ ions through one-electron capture by projectiles in C q+ , O q+ (q = 1-4)-Ar collisions, in the energy range from 15 to 480 keV/u or v p = 0.8-4.4 a.u.…”

Electron-recoil ion and recoil ion-projectile coincidence techniques applied to obtain absolute partial collision cross sections

“…Despite the fact that the multiple ionization of rare gas targets in collision with ions has been extensively investigated over the past several decades, 1 it still continues to pose experimental [2][3][4][5][6][7][8][9][10][11][12][13][14][15] and theoretical challenges. 13,[16][17][18][19][20] For example, studies focused on the comparison between bare or partially stripped ions shed light on the role of the projectile effective charge state in direct multiple ionization processes of rare noble gases.…”