INFLUENCE OF AN INTERFACE ON $N^{2}$D$\rightarrow ^{4} S$ EMISSION IN SOLID $N_{2}$
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Date
1979
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Ohio State University
Abstract
Known thicknesses of solid nitrogen (between 2 and 1000 nm) are deposited on substrates cooled to 15K in an ultrahigh vacuum system. The nitrogen it excite by a weak pulse of 3KeV and the $N^{2} D$ $\rightarrow ^{4} S$ lifetime measured. The radiative $N^{2}$D$\rightarrow ^{4} S$ lifetime varies from 37 seconds for very thick nitrogen films to less than 1 seconds for very thin nitrogen films. The radiative lifetime in also substrate dependent. Thin films of solid nitrogen on a sapphire substrate have much longer lifetimes and higher relative quantum efficiencies than do thin nitrogen films on a silver substrate. Thin nitrogen films on thin evaporated silver films over sapphire have even shorter lifetimes and lower quantum efficiencies.
Description
This work supported by Air Force Office of Scientific Research.
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