Molecular-Beam Measurements of the Emission Spectrum and Radiative Lifetime of N2 in the Metastable E 3Σg+ State
- 1 May 1969
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 50 (9), 3734-3740
- https://doi.org/10.1063/1.1671620
Abstract
Electron‐impact excitation of a molecular beam of nitrogen was used to produce the metastable E 3 Σ 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 paper reports the emission spectrum from the molecular beam, and identifies three forbidden electronic transitions, E 3 Σ g + → A 3 Σ u + , E 3 Σ g + → B 3 Π g , and E 3 Σ g + → C 3 Π u . Approximate absolute transition probabilities are determined. The radiative lifetime of the E state is 270 ± 100 μsec, and the equilibrium internuclear distance is 1.16 ± 0.02 Å.Keywords
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