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When electrically excited nitrogen was used as an absorber, about one hundred absorption bands were observed in the 1080–1300-Å region. They are not due to absorption by ordinary nitrogen, but are produced by transitions from the vibrationally excited (v=4–13) ground state X 1Σg+ to the j 1Σu+, b 1Πu, l 1Πu, m 1Πu, and b′ 1Σu+ states.
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Ogawa et al. (1964) studied this question.
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