A study of the A2II/B2Σ+ - X 2Σ+ band systems of calcium monohydride (CaH) using a supersonic molecular beam source and laser-induced fluorescence detection

Timothy Steimle, Jamie Gengler, Jinhai Chen

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

The high-resolution laser-induced fluorescence spectrum of a molecular beam sample of calcium monohydride (CaH) in the region of the strongly overlapped (1,0) A2II - X2Σ+ and (0,0) B 2Σ+ - X2Σ+ band systems near 630 nm and the (0,0) A2II - X2Σ+ band system near 690 nm have been recorded and analyzed. The spectral features exhibit a small splitting that is attributed to proton magnetic hyperfine interaction in the X2Σ+ (v = 0) state. The energy levels of the A2II(v = 0) vibronic state were modeled using a traditional "effective" Hamiltonian approach, whereas those for the interacting A2II(v = 1)/B2Σ+(v = 0) vibronic levels were modeled by augmenting the traditional effective Hamiltonian with terms to account for local perturbations. An interpretation of the field-free parameters is presented.

Original languageEnglish (US)
Pages (from-to)779-790
Number of pages12
JournalCanadian Journal of Chemistry
Volume82
Issue number6
DOIs
StatePublished - Jun 1 2004

Keywords

  • Calcium monohydride
  • Fluorescence
  • Molecular beam

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Organic Chemistry

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