D Andrick and L Langhans 1975 J. Phys. B: At. Mol. Phys. 8 1245 doi:10.1088/0022-3700/8/8/015
D Andrick and L Langhans
Show affiliationsApart 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.
Issue 8 (1 June 1975)
D Andrick and L Langhans 1975 J. Phys. B: At. Mol. Phys. 8 1245
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