MOLECULAR BEAM MEASUREMENTS OF THE EMISSION SPECTRUM AND RADIATIVE LIFETIME OF $N_{2}$ IN THE METASTABLE E $^{3}\Sigma^{+}_{g}$ STATE.
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Date
1969
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Ohio State University
Abstract
Electron impact excitation of a molecular beam of nitrogen was used to produce the metastable $E^{3}\Sigma^{+}_{g}$ state. This state, which lies 11.87 eV above the ground state, has recently been observed in a number of electron impact experiments. This talk reports the emission spectrum from the molecular beam, and identifies three forbidden electronic transitions, $E^{3}\Sigma^{+}_{g} \rightarrow A ^{3}\Sigma^{+}_{u}, E^{3}\Sigma^{+}_{g} \rightarrow B^{2}\Pi_{g}$ and $E^{3}\Sigma_{g} \rightarrow C^{3}\Pi_{u}$. Approximate absolute transition probabilities are determined. The radiative lifetime of the E state is $270 \pm 100\, \mu$sec, and the equilibrium internuclear distance is $1.16 \pm 0.02{\AA}$.
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Author Institution: Bell Telephone Laboratories, Incorporated, Murray Hill