Isotopic variation of experimental lifetimes for the lowest Πu1 states of N2

Lifetimes of several Πu1 states of the three natural isotopomers of molecular nitrogen, N214,N14N15, and N215, are determined via linewidth measurements in the frequency domain. Extreme ultraviolet (XUV)+UV two-photon ionization spectra of the bΠu1(v=0–1,5–7) and c3Πu1(v=0) states of N214,bΠu1(v=0–1...

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Bibliographic Details
Published in:The Journal of chemical physics 2005-04, Vol.122 (14)
Main Authors: Sprengers, J. P., Ubachs, W., Baldwin, K. G. H.
Format: Article
Language:English
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Summary:Lifetimes of several Πu1 states of the three natural isotopomers of molecular nitrogen, N214,N14N15, and N215, are determined via linewidth measurements in the frequency domain. Extreme ultraviolet (XUV)+UV two-photon ionization spectra of the bΠu1(v=0–1,5–7) and c3Πu1(v=0) states of N214,bΠu1(v=0–1,5–6) and c3Πu1(v=0) states of N14N15, and bΠu1(v=0–7),c3Πu1(v=0), and oΠu1(v=0) states of N215 are recorded at ultrahigh resolution, using a narrow band tunable XUV-laser source. Lifetimes are derived from the linewidths of single rotationally resolved spectral lines after deconvolution of the instrument function. The observed lifetimes depend on the vibrational quantum number and are found to be strongly isotope dependent.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.1869985