A study of the à 2B2-X̃ 2A 1 band system of CaNH2 employing molecular beam optical Stark spectroscopy

A. J. Marr, M. Tanimoto, D. Goodridge, Timothy Steimle

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The 000 à 2B2-X̃ 2A1 visible band system of a supersonic molecular beam sample of calcium amide, CaNH2, recorded in the presence of a variable static electric field has been studied using high resolution laser induced fluorescence spectroscopy. The determined spectroscopic parameters are (in cm-1), origin=15 464.366 9(8); A″=13.057 4(9); B″=0.30047(5); C″=0.292 88(5); εbb″ = 0.001 1(3); εcc″ = 0.001 1(3); A′ = 11.448 7(2); B′=0.3071(1); C′=0.2992(1); εaa′ = 8.238(2); εbb′ = 0.005 2(6); εcc′ = 0.055 7(6); Δks=-0.060 8(5). The rotational parameters are interpreted to give an approximate r0 structure. The large spin-rotation parameter for the à 2B2 state is discussed in terms of a second order spin-orbit interaction with other low-lying electronic states. Stark splitting of the PP11(1.5) + PQ12(0.5) branch feature was analyzed to produce a ground state permanent electric dipole moment, μ″, of 1.74(1) D. A comparison of μ″ with other monovalent calcium compounds is given.

Original languageEnglish (US)
Pages (from-to)4466-4475
Number of pages10
JournalThe Journal of chemical physics
Issue number11
StatePublished - 1995

ASJC Scopus subject areas

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


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