Electron capture in intermediate-to-fast heavy ion collisions with neutral atoms

Charge stripping ofU238ion beam by helium gas stripper

“…Although the low-Z species H 2 and He are simple target systems with two electrons, the theoretical EL and EC cross sections for 238 U with low-Z gases are known only to a factor of 2-3 at best [24][25][26]. This is insufficient for obtaining the charge-state evolution reliably.…”

Future experiments using forward electron spectroscopy to study the quantum dynamics of high-Zions at the ESR/CRYRING storage rings

“…The SIS12/18 needs to inject 1.3 × 10 11 ions at 2.6 Hz into the SIS100 synchrotron, which then provides beams from 400 A MeV to 2.7 A GeV for experiments. For the charge state 28+ of the U beam, the dominant beam loss is projectile ionization U 28+ + {A} → U (28+n)+ + {A + * } with n 1; a fraction exceeding 40% has been calculated [9][10][11][12] for multiple loss n 2 arising from the large number of weakly bound electrons on the projectile (E B = 930 eV for the ionization potential of U 28+ ). Attempts at first-order theoretical description of the ionization of U 28+ in fast collisions (v e v projectile for outermost electrons) have surprisingly produced mixed results.…”

Collision processes involving heavy many-electron ions interacting with neutral atoms

“…ÇÑÓËâ: ÔÄÇÕÎÞÇ ÍÓÖÉÍË ì ÓÂÔÚÈÕ ÏÇÕÑAEÑÏ ³´®³ [61] (Â), [68] (Ã); ÒÖÐÍÕËÓÐÂâ ÍÓËÄÂâ (Â) ì ÒÓËÃÎËÉÇÐËÇ àÌÍÑÐÂΠ[61]; ÛÕÓËØÒÖÐÍÕËÓ-ÐÂâ ÍÓËÄÂâ (Ã) ì ÒÓËÃÎËÉÇÐËÇ CDW [67]; ÔÒÎÑÛÐÞÇ ÍÓËÄÞÇ ì ÒÓÑÅÓÂÏÏ CAPTURE [67]. (17), (18); ÒÓË àÕÑÏ…”