The hyperfine structure in the rotational spectra of D₂O: Lamb-dip measurements and quantum-chemical calculations

Gabriele Cazzoli (1) , Luca Dore (1) , Cristina Puzzarini (1) , Jürgen Gauss (2)

1 UNIBO - Alma Mater Studiorum Università di Bologna = University of Bologna
2 Institut für Physikalische Chemie

Thirteen rotational transitions of the doubly deuterated isotopic species of water, D₂¹⁶O, have been recorded in the millimeter- and submillimeter-wave region. The Lamb-dip technique has been used to resolve the hyperfine structure due to deuterium quadrupole coupling, due to spin-rotation as well as dipolar spin-spin interactions, thus enabling the determination of the corresponding hyperfine parameters to a good accuracy. The experimental investigation has been assisted by high-level quantum-chemical calculations of the hyperfine parameters.

Mots clés: Physical Sciences

Gabriele Cazzoli, Luca Dore, Cristina Puzzarini, Jürgen Gauss. The hyperfine structure in the rotational spectra of D₂O: Lamb-dip measurements and quantum-chemical calculations. Molecular Physics, 2010, pp.1. ⟨10.1080/00268976.2010.484395⟩. ⟨hal-00604410⟩