The radiative lifetime of N2(a 1Πg, v=0-2)

We have employed direct two-photon laser excitation of specific vibrational levels of N2(a 1 Πg) to measure the lifetime of this state. Direct observation of emission from the a 1Πg –X 1∑+g transition in a large cell was employed to follow fluorescence decays. Experiments were conducted to verify th...

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Bibliographic Details
Published in:The Journal of chemical physics 1989-07, Vol.91 (2), p.701-707
Main Authors: MARINELLI, W. J, KESSLER, W. J, GREEN, B. D, BLUMBERG, W. A. M
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Intensities and shapes of molecular spectral lines and bands
Molecular properties and interactions with photons
Physics
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Summary:We have employed direct two-photon laser excitation of specific vibrational levels of N2(a 1 Πg) to measure the lifetime of this state. Direct observation of emission from the a 1Πg –X 1∑+g transition in a large cell was employed to follow fluorescence decays. Experiments were conducted to verify that the effects of collisional transfer and diffusion were not contributing to the observed lifetime. Our experiments showed that the radiative lifetime of vibrational levels 0–2 is 56±4 μs and is independent of vibrational level, within experimental error. The observed lifetimes are in good agreement with recently reported theoretical calculations.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.457175