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A series of resonances with spacing 0.3 eV has been observed in the 11.2- to 12.5-eV range of the cross section for production of H^- by dissociative attachment of electrons in H₂. Comparison is made with resonances in the elastic scattering and vibronic excitation. Mechanisms involving vibrational levels of quasibound, excited states of H₂^- are discussed.
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Dowell et al. (1968) studied this question.
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