Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5375713 | Chemical Physics | 2008 | 7 Pages |
Abstract
Dispersed fluorescence spectroscopy has been employed to study vibrational selectivity accompanying electronic autoionisation in N2O. Vibrationally resolved fluorescence excitation spectra of the N2O+Aâ¼2Σ+âXâ¼2Î transition have been recorded in the photon energy range 16.2-20.7 eV to monitor the formation of (0 0 0), (1 0 0), (2 0 0), (0 0 1) and (1 0 1) Aâ¼2Σ+ state ions. The spectra exhibit prominent structure due to autoionisation from Rydberg states belonging to series converging onto the (0 0 0) Câ¼2Σ+ limit. Of the five series converging onto this limit, the most significant enhancement in the population of vibrationally excited Aâ¼2Σ+ state ions occurs via autoionisation from the ndÏ or ndÏ series. Within a single Rydberg series, the degree of vibrational enhancement varies considerably with principal quantum number. Previously unobserved bands in the N2O+Aâ¼2Σ+âXâ¼2Î dispersed fluorescence spectrum have been assigned using energy levels determined in photoelectron spectroscopic studies.
Related Topics
Physical Sciences and Engineering
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Authors
D.A. Shaw, D.M.P. Holland,