Relaxation cross section measurements on NH3 and lower state focussing in a beam maser

K. R. Chien, P. B. Foreman, K. H. Castleton, S. G. Kukolich

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13 Scopus citations


Scattering cross for the lower state of the J=3, K=2 inversion doublet of NH3 were measured using a beam maser spectrometer. The observed relaxation cross sections were the same as those obtained previously for the upper inversion state. These results support previous interpretations of observed relaxation cross sections for coherent superposition states. A coaxial electrostatic focusser state selector for beam maser spectroscopy which provides efficient focussing of states with a negative Stark effect is described.

Original languageEnglish (US)
Pages (from-to)161-163
Number of pages3
JournalChemical Physics
Issue number1
StatePublished - Jan 1975

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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