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Search for additional resonances in e--helium scattering below the first excitation threshold

D Andrick and L Langhans

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Apart from the well known 2S negative ion state found in e--He scattering, additional p and d wave resonances below the first excitation threshold have been reported by several authors. A careful experimental investigation of the differential cross section does not confirm these observations. If such resonances exist, their width should be smaller than 10 mu eV.


PACS

34.50.Fa Electronic excitation and ionization of atoms (including beam-foil excitation and ionization)

Subjects

Atomic and molecular physics

Dates

Issue 8 (1 June 1975)



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