Atomic physics with highly charged ions. Progress report, 15 August 1992--14 August 1993
The past year has been a busy one for all three accelerators, the LINAC, EBIS and the tandem. The EBIS continues to deliver beams of highly charged ions around the clock for the study of low energy collisions with gases and surfaces. The electron beam energy has been upgraded to 10 keV, and intensities of highly charged species such as Xe{sup 44+} have been greatly increased. The tandem, the traditional source of highly charged Binary encounter electron production at zero degrees were studied for medium Z (Si,Cl,Cu) projectiles. Recoil momentum spectroscopy has been used to separate the contributions to collisional ionization of one-electron ions (C{sup 5+}, O{sup 7+}, F{sup 8+}) from the nucleus and the electrons of a He target. Marked structure in the binary encounter electron spectra for Cu{sup q+} on H{sub 2} targets has been measured for moderate velocity projectiles. Electron capture by slow multiply charged (EBIS) projectiles from laser excited targets has been carried out. Cross sections for capture from Na(3s) and Na*(3p) have been measured for velocities between 0.1 and 1 au. The extension of these experiments to laser excited Rydberg targets is proceeding. Electron capture cross sections and average Q values for Ar{sup 16+} on He at velocities between 0.23 and 1.67 au have been measured. The charge state distribution of the He recoils following large angle scattering of C{sup 4+} and C{sup 6+} ions at 7.5 keV/u has been measured. Cross sections have been measured for up to sextuple capture from C{sub 60} (buckminsterfullerene) by highly charged slow projectiles. Coupled channel calculations for double capture from He by slow multicharge ions have been carried out.
- Research Organization:
- Kansas State Univ., Manhattan, KS (United States). J.R. MacDonald Lab.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-86ER13491
- OSTI ID:
- 10105410
- Report Number(s):
- DOE/ER/13491-641; ON: DE94003397; BR: KC0301020/KC0301030; TRN: 94:002161
- Resource Relation:
- Other Information: PBD: Oct 1993
- Country of Publication:
- United States
- Language:
- English
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