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pro vyhledávání: '"D J L Mercer"'
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 32:L45-L50
Differential cross sections for electron impact excitation of the first four excited states of helium have been measured for electron impact energies of 30, 40 and 50 eV. A novel `magnetic angle-changing' technique has been used which allows the full