Determination of the normal A(2)Pi state in MgF with application to direct laser cooling of molecules

Xu, S., Xia, M., Yin, Y., Gu, R., Xia, Y. & Yin, J., 28-Feb-2019, In : Journal of Chemical Physics. 150, 8, 8 p., 084302.

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  • Determination of the normal A2Π state in MgF with application to direct laser cooling of molecules

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  • Supeng Xu
  • Meng Xia
  • Yanning Yin
  • Ruoxi Gu
  • Yong Xia
  • Jianping Yin

We report high resolution electronic spectroscopy of cold magnesium monofluoride (MgF) molecules in the gas phase, which are created by a combination of laser ablation, chemical reaction, and 6 K helium buffer-gas cooling. Thanks to the sufficient population in the low-lying rotational states, the P, Q, and R branches in the electronic transition of the X-2 Sigma(+) to A(2)Pi state are able to be measured unambiguously by in-cell absorption spectra. For the first time, we show that the A(2)Pi state of MgF is actually a normal state, not an inverted one. The laser cooling relevant transitions X-2 Sigma(+)(v = 0, 1, N = 1) -> A(2)Pi(1/2)(v = 0, J' = 1/2) are also identified, along with the hyperfine structure of the X-2 Sigma(+)(v = 0, N = 1) state. This study provides an important step for ongoing laser cooling experiments of MgF molecules. Published under license by AIP Publishing.

Original languageEnglish
Article number084302
Number of pages8
JournalJournal of Chemical Physics
Issue number8
Publication statusPublished - 28-Feb-2019
Externally publishedYes

ID: 118750500