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- W2051212698 abstract "Absolute doubly differential cross sections for electron emission are presented for 0.5-MeV/u multicharged ion-atom collisions. The collision systems investigated are ${mathrm{B}}^{mathit{q}+}$, ${mathrm{C}}^{mathit{q}+}$ (q=2--5) and ${mathrm{O}}^{mathit{q}+}$, ${mathrm{F}}^{mathit{q}+}$ (q=3--6) projectiles impacting on helium and ${mathrm{C}}^{mathit{q}+}$ (q=2--5) ions impacting on neon and argon targets. Laboratory electron emission angles between 10ifmmode^circelsetextdegreefi{} and 60ifmmode^circelsetextdegreefi{} were studied. Under the assumption that the cross sections scale with the square of an effective projectile charge, ${mathit{Z}}_{mathit{e}mathit{f}mathit{f}}$(ensuremath{varepsilon},ensuremath{theta}), the scaling was investigated as a function of emitted electron velocity and angle. For distant collisions (low-energy electron emission), we find that ${mathit{Z}}_{mathit{e}mathit{f}mathit{f}}$(ensuremath{varepsilon},ensuremath{theta})>q for small q. For the highest values of q investigated, ${mathit{Z}}_{mathit{e}mathit{f}mathit{f}}$(ensuremath{varepsilon},ensuremath{theta}) was found to be smaller than the net projectile charge q. The effective projectile charges may be subject to a systematic underestimation since they were determined by referencing the partially stripped ion impact data to fully stripped boron, rather than proton, impact cross sections. In the binary-encounter region, the present data confirm previously observed features--namely that the emission increases as q decreases. For the helium target, the qualitative behavior is roughly in accordance with predictions by Schulz and Olson [J. Phys. B 24, 3409 (1991)]. Neon and argon targets also demonstrate these features, but less dramatically than helium." @default.
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- W2051212698 title "Systematics and scaling of differential ionization cross sections in multicharged ion-atom collisions" @default.
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- W2051212698 doi "https://doi.org/10.1103/physreva.49.350" @default.
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