LASER-INDUCED FLUORESCENCE-SPECTRUM OF THE A(2)PI-X(2)SIGMA(1,1) BANDOF ZRN

The A(2) Pi-X(2) Sigma (1,1) band of ZrN between 5642 and 5879 Angstro m has been studied using laser induced fluorescence spectroscopy. ZrN was produced by reacting vaporized ZrCl4 with microwave discharged N-2 gas. All the N-2 branches expected from a (2) Pi-(2) Sigma transition have been observed and assigned. Various perturbations in the (2) Pi( 3/2) substate upsilon = 1 level have been found, in which the one at J = 38.5 is ascribed to a degenerate state. The magnetic hyperfine stru cture of the (ZrN)-Zr-91 has also been identified. A least-squares fit up to J = 30.5 yielded molecular constants for both the A(2) Pi and t he X(2) Sigma states of four isotopic molecules. (C) 1996 Academic Pre ss, Inc.