Erratum to “Experimental study of the NaK 31Π state” [J. Mol. Spectrosc. (1999) 193 376–388]

Spin–orbit coupling of the NaK 33Π and 31Π states: Determination of the coupling constant and observation of quantum interference effects

“…(Later we will present evidence verifying this conjecture.) We carried out calculations based on the published molecular constants of the NaK 3 1 P state [11,66] and the reported levels of the NaK 3 3 P state (EPAPS Table 2 of Ref. 15) which indicate that the unperturbed 3 1 P 1 (v = 6,J = 19) and 3 3 P 0 (v = 32, J = 19) levels should indeed be nearly degenerate and lie at the appropriate energy necessary to identify them with the levels observed in the figure.…”

“…Calculated level energies are then compared to the measured energies and the parameters are varied until the calculated and measured energies agree in the least squares sense. In our present work we fixed the spectroscopic constants T v , B v , D v , and q v of the 3 1 P(v = 6) state to the values reported in the erratum to Laub et al [11] (but corrected for the slight difference between the ground state constants of Ross et al [69] and the more accurate, recent values of Russier et al [70]). In general, the 3 1 P state constants of Pashov et al [66] are probably superior to those of Laub et al, but the latter were chosen for the present work because they cover the same range of vibrational and rotational levels as those investigated here and are also based upon the same calibration.…”

“…[11] (corrected using the recent ground state constants of Russier et al [70]). The 3 3 P X=1 (v = 32) $ 3 1 P X=1 (v = 6) spin-orbit interaction constant |n| was obtained from the average splitting of the mutually perturbing level diagram of Fig.…”

“…Heteronuclear alkali molecules have permanent dipole moments and are, therefore, of particular interest because, in principle, they can be oriented in an optical lattice [1][2][3][4][5][6][7]. In our laboratory at Lehigh University we have carried out a series of high-resolution spectroscopic studies of various excited electronic states of the heteronuclear alkali diatomic molecule NaK [8][9][10][11][12][13][14][15][16][17]. We have been particularly interested in the fine and hyperfine structure of these states and how variations in these structures with vibrational and rotational quantum numbers reflect changes in the electronic wavefunction with internuclear separation.…”

“…Using the experimental potentials of Refs. [15], [11], [76] and [77] with the theoretical transition dipole moments of Magnier et al, we calculate…”