58.4 nm PHOTON EXCITATION OF SOLID AND MATRIX ISOLATED $N_{2}$
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Date
1978
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Ohio State University
Abstract
Optical luminescence of both argon matrix isolated $N_{2}$ and solid $N_{2}$ excited by 58.4 nm photons is observed. In both systems Goldstein-Kaplan bands $(N_{2},C^{\prime} {^{3}}_{\Pi}{_{u}}\rightarrow B^{3}\Pi_{g})$ and atomic N emission $(^{2}D^{0}\rightarrow ^{4}S^{0})$ are seen. Vegard-Kaplan bands $(N_{2}, A^{3}\Sigma^{+}_{u}\rightarrow X^{1}\Sigma^{+}_{g})$ are observed in argon matrix Isolated $N_{2}$ but not in solid $N_{2}$. Photoelectron spectroscopy of solid $N_{2}$ using 58.4 nm $photons^{1}$ has indicated that the lowest three electronic levels of $N_{2}$ are populated; however, no $N_{2}^{+}$ emission is observed between 200 and 700 nm. All photoluminescence from both the solid and matrix is red-shifted relative to gas phase results. The formation of the $N_{2} C^{^{\prime} 3}\Pi_{u}$ state, which previously has not been observed in the solid or matrix, is attributed to electron-$^{N} {+}_{2}$ recombination, since recent theoretical $work^{2}$ on recombination indicates the formation of a $^{3} \Pi_{u}$ state of $N_{2}$.
Description
$^{1}$P. R. Norton, R. L. Tapping, H. P. Broida, J. W. Gadzuk and B, J. Waclawski, Chem. Phys. Lett. 53, 465 (1978). $^{2}$ M. Michels, The Excited State in Chemical Physics, II, edited by J. W. McGowan (Wiley and Sons, New York, 1978). This work was supported by Air Force Office of Scientific Research and National Science Foundation. H. P. Broida was deceased April 9, 1973.""
Author Institution: Department of Physics and Quantum Institute, University of California
Author Institution: Department of Physics and Quantum Institute, University of California