Low-energy measurements of electron capture by multicharged ions from hydrogen Rydberg atoms
Journal Article
·
· Bulletin of the American Physical Society
OSTI ID:281560
- Oak Ridge National Laboratory, TN (United States)
For very low collision energies electron capture from hydrogen Rydberg atoms by multicharged ions is characterized by enormous cross sections, the predicted maximum being comparable to the geometric size of the Rydberg atom. Our recent efforts to quantify these cross sections for the wide range of collision energies (0.1 to 1000 eV/amu) and charge states accessible to the ORNL ion-atom merged-beams apparatus will be presented. Presently, a fast H(D) beam containing 0.15% in n shells between 11 and 24 is produced by collisional detachment of H{sup -} in N{sub 2} gas. A Rydberg field stripper is used to truncate the n-shell population of the H excited states before merging with the multicharged ion beam. From measurements of the beam-beam signal as a function of the applied stripper electric field we are able to infer the n-dependence of the capture cross section.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 281560
- Report Number(s):
- CONF-9305421--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 38; ISSN BAPSA6; ISSN 0003-0503
- Country of Publication:
- United States
- Language:
- English
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