Cold collision and the determination of the X2Σ1/2(v = 1, N = 1) → A2Π1/2(v‧ = 0, J‧ = 1/2) frequency with buffer-gas-cooled MgF molecules
Abstract
We report a detailed experimental study of the cold collision of magnesium mono-fluoride (MgF) with buffer gas and compare the cryogenic molecular beam source of two different inner structures of cell. The collision cross section with helium is measured to be ∼ 0.8 ×10-14 cm2 at 7.5 K, which is suitable for buffer-gas cooling. The absorption spectrum around 368.7 nm at low-lying rotational states is assigned and the accurate frequency of X2Σ1/2(v = 1, N = 1) → A2Π1/2(v‧ = 0, J‧ = 1/2) transition is determined to be 812.959246 THz, which is essential for constructing the quasi-closed cycling between vibrational states. Our study is an important complement to laser cooling of MgF molecules.
- Publication:
-
Journal of Quantitative Spectroscopy and Radiative Transfer
- Pub Date:
- October 2019
- DOI:
- 10.1016/j.jqsrt.2019.106583
- Bibcode:
- 2019JQSRT.23606583X