title: Experimental studies of the NaCs 5(3)Π0 and 1(a)3Σ+ states.
abstract: We report high resolution measurements of 372 NaCs 5(3)Π(0)(v, J) ro-vibrational level energies in the range 0 ≤ v ≤ 22. The data have been used to construct NaCs 5(3)Π(0) potential energy curves using the Rydberg-Klein-Rees and inverted perturbation approximation methods. Bound-free 5(3)Π(0)(v, J) → 1(a)(3)Σ(+) emission has also been measured, and is used to determine the repulsive wall of the 1(a)(3)Σ(+) state and the 5(3)Π(0) → 1(a)(3)Σ(+) relative transition dipole moment function. Hyperfine structure in the 5(3)Π(0) state has not been observed in this experiment. This null result is explained using a simple vector coupling model.
authors.affiliation: Department of Physics, 16 Memorial Dr. East, Lehigh University, Bethlehem, Pennsylvania 18015, USA.
authors.forename: S
authors.initials: S
authors.lastname: Ashman
authors.forename: B
authors.initials: B
authors.lastname: McGeehan
authors.forename: C M
authors.initials: CM
authors.lastname: Wolfe
authors.forename: C
authors.initials: C
authors.lastname: Faust
authors.forename: K
authors.initials: K
authors.lastname: Richter
authors.forename: J
authors.initials: J
authors.lastname: Jones
authors.forename: A P
authors.initials: AP
authors.lastname: Hickman
authors.forename: J
authors.initials: J
authors.lastname: Huennekens