Hyperfine structure of the a1g - X 3Σg − transitions of 16O17O, 17O18O and 17O2 by CRDS at 80 K

Samir Kassi (1, 2) , Olga Leshchishina (1, 3, 2) , I.E. Gordon (4) , S.S. Yu (5) , Alain Campargue (1, 2)

1 LSP - Laboratoire de Spectrométrie Physique
2 LAME-LIPhy - LAsers, Molécules et Environnement
3 LTS - Laboratory of Theoretical Spectroscopy [Tomsk]
4 AMP - Atomic and Molecular Physics Division [Cambridge]
5 JPL - Jet Propulsion Laboratory

The high sensitivity absorption spectrum of the a1g-X 3Σg − band of 16O17O, 17O18O and 17O2 has been recorded by CW-Cavity Ring Down Spectroscopy near 1.27 μm. The spectra were obtained between 7640 and 7917 cm-1 with a 17O-enriched sample at room temperature and at 80 K. Due to the I= 5/2 nuclear spin of the 17O atom, the nuclear hyperfine structure of the transitions could be partly resolved at low temperature. The parameter coupling of the nuclear spin to the electronic angular momentum in the a1g state has been derived for the three studied isotopologues of oxygen.

Domaines: Physique Atomique [physics.atom-ph]; Optique [physics.optics]

Samir Kassi, Olga Leshchishina, I.E. Gordon, S.S. Yu, Alain Campargue. Hyperfine structure of the a1g - X 3Σg − transitions of 16O17O, 17O18O and 17O2 by CRDS at 80 K. Chemical Physics Letters, 2011, 502, pp.37-41. ⟨10.1016/j.cplett.2010.12.017⟩. ⟨hal-00563216⟩