Molecular g values, magnetic susceptibilities, molecular quadrupole moment, and spin-rotation interaction in 15NH3

S. G. Kukolich, W. H. Flygare

Research output: Contribution to journalArticle

16 Scopus citations


The first-order Zeeman effect was observed at 25 kg on the inversion transition in 15NH3 for seven different rotational states. The measured g values are g = 0·563±0·001 and g = 0·500±0·001. The upper limit on the magnetic susceptibility anisotropy in ammonia is determined to be (image found) The molecular quadrupole moment is Q = - (1·9±1·0) × 10-26 e.s.u. cm2. The diagonal elements in the diamagnetic and paramagnetic susceptibility tensors are given along with the second moment of the electronic charge distribution. The molecular g values are combined with the nitrogen and hydrogen spin-rotation constants to obtain values of 1/r3 matrix elements between ground and excited states. The results for NH3 are compared to the recent results in H2O.

Original languageEnglish (US)
Pages (from-to)127-133
Number of pages7
JournalMolecular Physics
Issue number2
StatePublished - Jan 1 1969
Externally publishedYes


ASJC Scopus subject areas

  • Biophysics
  • Molecular Biology
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this