title: Zeeman effect in CaF(2Pi(3/2)).
abstract: The Zeeman effect in the excited A 2Pi(3/2) state of CaF is measured and analyzed over a wide range of magnetic fields. It is found that the splitting of the Zeeman levels is largely determined by the coupling between different rotational states and there are no low-field seeking states in the J=3/2 manifold of Zeeman levels at high magnetic fields. A model of the Zeeman spectrum based on the ligand-field theory of CaF is shown to be accurate in the interval of magnetic fields 0-5 Tesla. This demonstrates that the magnetic moment of the CaF(A 2Pi(3/2)) molecule is effectively determined by the spin angular momentum of a single electron and the orbital motion of the valence electron around the Ca2+ core. An analysis of the Zeeman spectrum as a function of the molecular rotational constant indicates that 2Pi(3/2) molecules should have significant rotational constants (at least as large as twice the rotational constant of CaF) to be amenable to magnetic trapping in high fields.
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA. rkrems@cfa.harvard.edu
authors.forename: R V
authors.initials: RV
authors.lastname: Krems
authors.forename: D
authors.initials: D
authors.lastname: Egorov
authors.forename: J S
authors.initials: JS
authors.lastname: Helton
authors.forename: K
authors.initials: K
authors.lastname: Maussang
authors.forename: S V
authors.initials: SV
authors.lastname: Nguyen
authors.forename: J M
authors.initials: JM
authors.lastname: Doyle