Jump to main content
Jump to site search

Volume 71, 1981
Previous Article Next Article

Rydberg spectra of triatomic hydrogen and of the ammonium radical

Abstract

In hollow-cathode discharges through H2 and D2 a number of new emission bands have been observed which have been identified as belonging to triatomic hydrogen (H3 and D3) in Rydberg states. The information about the structures of these radicals in the upper and lower states of the observed bands is summarized. The geometry is very similar to that of the H3+ ion. A related Rydberg spectrum is expected and observed for the NH4 radical. Spectra first observed by Schuster in 1872 and by Schüler, Michel and Grün in 1955 in discharges through ammonia are shown by isotope studies to be due to the free ammonium radical. The spectra of ND4 are more intense and sharper than those of NH4. A full analysis has not yet been accomplished but there is little doubt that NH4 is tetrahedral in its Rydberg states.

Back to tab navigation

Article type: Paper
DOI: 10.1039/DC9817100165
Citation: Faraday Discuss. Chem. Soc., 1981,71, 165-173
  •   Request permissions

    Rydberg spectra of triatomic hydrogen and of the ammonium radical

    G. Herzberg, Faraday Discuss. Chem. Soc., 1981, 71, 165
    DOI: 10.1039/DC9817100165

Search articles by author

Spotlight

Advertisements