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Double excitation of helium by fast electrons, protons, and C/sup (4//sup --//sup 6)+/ ions

Journal Article · · Phys. Rev. Lett.; (United States)
The electron emission yield from the doubly excited /(2p/sup 1/)/sup 2/D+(2s2p)/sup 1/P/ states in He excited by impact of fast equivelocity electrons, protons, and carbon ions (charge state 4--6) has been measured at the reduced energy of 1.84 MeV/amu. The data constitute a challenge to the recently proposed models that incorporate electron-correlation effects in atomic collisions.
Research Organization:
Institute of Physics, University of Aarhus, DK-8000 Aarhus C, Denmark
OSTI ID:
6320733
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 62:20; ISSN PRLTA
Country of Publication:
United States
Language:
English