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

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36 Citations (Scopus)

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 2004

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Hamiltonians
Molecular beams
Light sources
Calcium
Fluorescence
Lasers
Electron energy levels
Protons

Keywords

  • Calcium monohydride
  • Fluorescence
  • Molecular beam

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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title = "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",
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.",
keywords = "Calcium monohydride, Fluorescence, Molecular beam",
author = "Timothy Steimle and Jamie Gengler and Jinhai Chen",
year = "2004",
month = "6",
doi = "10.1139/v04-077",
language = "English (US)",
volume = "82",
pages = "779--790",
journal = "Canadian Journal of Chemistry",
issn = "0008-4042",
publisher = "National Research Council of Canada",
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TY - JOUR

T1 - 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

AU - Steimle, Timothy

AU - Gengler, Jamie

AU - Chen, Jinhai

PY - 2004/6

Y1 - 2004/6

N2 - 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.

AB - 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.

KW - Calcium monohydride

KW - Fluorescence

KW - Molecular beam

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