Electron loss from 0.74- and 1.4-MeV/u low-charge-state argon and xenon ions colliding with neon, nitrogen, and argon

Scaling laws for single and multiple electron loss from projectiles in collisions with a many-electron target

“…For these reasons, several experimental [3][4][5][6][7] and theoretical [3][4][5][8][9][10][11] studies of electron loss by low-charge-state MeV/ u ions have been performed in the past couple of years. Unfortunately, no experimental information for the desired species is available in the tens to hundreds of MeV/ u region.…”

“…Of the numerous theoretical studies that have been performed, except for recent classical trajectory Monte Carlo (CTMC) calculations of Olson et al [3][4][5]8], all have been based on plane-wave Born calculations. With regard to scaling laws, Shevelko et al have used plane-wave Born approximation calculations [9][10][11] to calculate stripping cross sections for a variety of projectiles and targets.…”

“…The cross sections for highly charged ions are found to decrease extremely fast with increasing projectile charge, e.g., q −8-10 in some cases [16][17][18] but slower q −3-4.4 in other cases [19]. In contrast, recent CTMC calculations [3,4] and experiments [4] imply that low-charge heavy ions have a much slower dependence of approximately q −1 .…”

Total projectile electron loss cross sections ofU28+ions in collisions with gaseous targets ranging from hydrogen to krypton

“…To benchmark the theoretical approaches and semiempirical scaling laws developed for such systems, experimental data covering a wide range of collision energies as well as ion species and target systems are needed. Previous experimental studies of the EL cross sections of low-charged, heavy ions were mainly restricted to energies below 10 MeV=u [20][21][22][23][24][25][26][27][28][29][30], whereas for ion-driven fusion scenarios beam energies ranging from about 15 MeV=u up to roughly 500 MeV=u [31] are most relevant and in case of the FAIR facility the energy region of interest even extends up to the relativistic GeV=u regime. Recently, we presented a first EL cross section measurement for a low-charged ion, namely U 28þ , covering beam energies up to 50 MeV=u that was performed at the experimental storage ring (ESR) of the GSI Helmholtz Center for Heavy Ion Research [32].…”

Beam lifetimes for low-charge-state heavy ions in the GSI storage rings

“…Using the GSI UNILAC accelerator section, we studied electron loss from extremely low charged Ar, Xe and U ions (1 -4+), but only for energies less than 1.4 MeV/u [12][13][14]. At the Texas A&M cyclotron, energies up to 10 MeV/u were studied for Ar 6+,8+ [15], Kr 7+ and Xe 11+ [16], Xe 18+ [17,18] and U 28+ ions [11].…”