Abstract
A. B. C. and Hedges1 have described a technique of monochromatic flash spectroscopy in which an intense pulse of Hg 2537 Å radiation was generated with a microwave discharge. The light was absorbed in a reaction system containing Hg vapour with various quenching gases and transient species were produced at a sufficiently high concentration for their detection by kinetic absorption spectroscopy. We report here the discovery that monochromatic excitation can also be achieved with a specially designed, electroded flashlamp. The method is simple and highly practicable. We have achieved quantal absorptions two-fold greater than that of A. B. C. and Hedges, and the new technique can also be applied with very low pressures of reactants. The determination of the relative yields of mercury hydrides in the quenching of Hg(63P1) by H2, 2H2 and H2H is described to show application of the method; quenching by H2H was found to produce Hg2H preferentially and this observation indicates a possible mechanism for the reactions.
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References
Callear, A. B., and Hedges, R. E. M., Nature, 218, 163 (1968).
Kley, D., Stuhl, F., and Welge, K. H., Z. Naturforsch., 18 a, 906 (1963).
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Van den Bergh, H. E., Callear, A. B., and Norstrom, R. J., Chem. Phys. Lett., 4, 101 (1969).
Callear, A. B., and Hedges, R. E. M., Trans. Faraday Soc. (in the press).
Breckenridge, W., and Callear, A. B., Chem. Phys. Lett., (in the press).
Callear, A. B., and Wood, P. M., Chem. Phys. Lett. (in the press).
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CALLEAR, A., MCGURK, J. Preferential Hg2H Formation in the Quenching of Hg(63P1) by H2H. Nature 226, 844–845 (1970). https://doi.org/10.1038/226844a0
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DOI: https://doi.org/10.1038/226844a0
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