Studying the N+2(C2Σ+u → X2Σ+g) fluorescence excited via the 1s−1π* resonance - Ehresmann, Arno; Werner, Lutz; Klumpp, Stefan; Lucht, S; Schmoranzer, Hans; Mickat, Sascha; Schill, Rüdiger; Schartner, Karl; Demekhin, Philipp; Lemeshko, Mikhail; Sukhorukov, Victor (Journal of Physics B: Atomic, Molecular and Optical Physics, 2006)
Fluorescence from fragments formed after the de-excitation of the N*2(1s−1π*) resonance has been measured in the spectral range of 135–190 nm. This range is dominated by lines in atomic nitrogen and lines formed by overlapping C2Σ+u(v') → X2Σ+g(v'') bands with Δv = const in the N+2 molecular ion which result from the spectator Auger decays of the N*2(1s−1π*(vr)) resonances. Ab initio calculations of the corresponding potential curves and transition probabilities showed that the observed irregular intensity dependence of the C2Σ+u(v') → X2Σ+g(v'')(Δv = const) fluorescence lines on the vibrational quantum number vr is due to transitions between vibrational levels during the reaction N2(v0 = 0)→ N*2(1s−1π*(vr)) Longrightarrow C2Σ+u(v') → X2Σ+g(v'').
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