Characterization of the [18.28]0--a3Δ1 (0,0) band of tantalum nitride, TaN

The [18.28]0(-)-a(3)Delta(1) (0,0) band near 647 nm of tantalum nitride, TaN, has been recorded and analyzed field-free and in the presence of static electric and magnetic fields. The fine and hyperfine parameters for the a(3)Delta(1) and [18.28]0(-) states are determined. The Ta-181(I = 7/2) axial nuclear electric quadrupole coupling constant, eQq(0), and the effective magnetic hyperfine coupling constant, h(1), are used to garner insight into the nature of electronic states. The Stark tuning of the P(2) and Q(1) lines was analyzed to determine the molecular frame permanent electric dipole moment, (mu) over right arrow (el), for the a(3)Delta(1) state of 4.49 +/- 0.09 D. The Zeeman effect on the P(1) line was analyzed to determine an upper limit of the magnetic moment, (mu) over right arrow (m), for the a(3)Delta(1) state. Scalar-relativistic coupled-cluster calculations for eQq0 and (mu) over right arrow (el) of the a(3)Delta(1) state are also reported and compared with experimental results. The determined properties are compared with the predicted values and the implication of the proposed scheme for determination of the 181Ta magnetic quadrupole moment is discussed. Published by AIP Publishing.