According theory and experiment in CaH: Laser-induced fluorescence study of new B/B′-X bands in the UV region

Kyohei Watanabe, Naoya Yoneyama, Kanako Uchida, Kaori Kobayashi*, Fusakazu Matsushima, Yoshiki Moriwaki, Stephen C. Ross

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Despite the astrophysical importance of calcium monohydride (CaH), a long-standing discrepancy exists between the experimental and theoretical analysis of its first two excited 2Σ+ states. In a bid to resolve this discrepancy, we observed the rotationally-resolved laser-induced fluorescence spectrum of CaH in the 23,300-27,800 cm-1 region. We assigned all newly observed vibrational levels, and five levels previously assigned to the D state, to the B/B′ state. The level properties alternate strongly with vibrational excitation and this new assignment brings the experimental vibronic structure into remarkably good agreement with the predictions of Carlsund-Levin et al. (2002).

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalChemical Physics Letters
Volume657
DOIs
StatePublished - 2016/07/16

Keywords

  • Calcium monohydride
  • Double-minimum potential
  • Electronic transition
  • Laser-induced fluorescence

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry

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