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A new type of electron impact spectrometer using an axial magnetic field for electron collimation is described. The feasibility of this apparatus for collision studies at low impact energies (0.1-30 eV) is demonstrated with vibrational and electronic excitation in He, N2, CO, and C2H2. The potentials and limitations of this new approach are also discussed.
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Tam et al. (1979) studied this question.
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