Fluorescence series originating from , of the state (mixed with of the state) of .
Plot of the expansion variables [see Eq. (10)] (solid curves) and (dashed curves) for various integer values of , showing the data region for ground-state .
Comparison of four representations of the long-range potential for the state of ; energies are in and distance in angstrom. As all curves converge to the case (c) limiting value .
Solid curves: long-range behavior of our recommended -state potentials for (black, uppermost solid curve), for (red, lowest solid curve), and for (blue, intermediate solid curve). Dashed black curve: Long-range behavior of the -state potential for if spin-orbit induced interstate mixing is ignored. Dash-dot-dot blue curve: long-range behavior of the -state potential for if the symmetry breakdown is ignored.
BOB radial strength functions determined with as the reference isotopologue: has units , while is dimensionless.
Open points: isotopologue dependence of empirical coefficients determined with three versions of the model Hamiltonian; the broken lines join the points for a given model to the “mass-infinity” theoretical value of Yan et al. (Ref. 49). Solid triangular points joined by a solid line are the very recent theoretical values of Tang et al. (Ref. 74).
Observed coincidences between and levels in , with transition wavenumbers in .
Summary of experimental data used in the present study.
Parameters defining the recommended MLR potentials and BOB functions for the and states of with as the reference isotopologue. The analysis used the excitation energy of and spin-orbit splitting energy of (Ref. 6). Units of length and energy are angstrom and ; the exponent expansion coefficients and the centrifugal BOB parameters of Eq. (25) are dimensionless, while the parameters defining the “adiabatic” BOB strength function of Eq. (24) have units of .
Some properties of the major isotopologues, with energies in and lengths in angstrom, with shifted properties of the minor isotopologues calculated from Eqs. (28)–(35).
Effect on the fit of fixing vs floating the and coefficients for the state of .
Effect on the fit of fixing vs freeing the and coefficients for the state of .
Comparison of well depths (in ) and coefficients (in ) determined herein with previously reported values.
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