(a) Potential energy curves for selected electronic states of LiRb (ab initio calculations from Ref. 3 ). (b) A typical spectrum of the LIF from the D1Π state following the laser excitation X(4,57)-D(1,58). For suppressing the scattered laser light a color glass filter was applied.
Gerö plots representing the distribution of the experimental data for all four isotopologues in LiRb for the B1Π state (a) and the D1Π state (b).
Perturbations in v′ = 0 (left) and v′ = 2 (right) for the state B1Π in LiRb.
Derived potentials for states B1Π, C1Σ+, and D1Π and their coupling functions b B (R) and b D (R) according Eq. (1) .
Deviations of the f-parity levels for v′ = 4 of the D1Π state from their predictions by the fitted potential curve (upper) and their actual observation in the experimental spectra (lower) where doubled lines are observed. The second line with label J ′ = 94 is very strong and thus overshoots in the drawing. The asymmetric line shape is an artifact of the Fourier transformation due to the large signal amplitude.
Histogram showing the distribution of the residuals E obs − E calc for the term energies of the D state. The solid line is a Gaussian fit resulting in a width of 0.011 cm−1.
The potential coefficients and derived molecular constants for state B1Π in 7LiRb. The potential energy is calculated with respect to the minimum of the ground state X1Σ+, the dispersion coefficients are adjusted for continuous connection to the respective excited atomic asymptote.
The potential coefficients and derived molecular constants for the state C1Σ+ in 7LiRb. The potential energy is calculated with respect to the minimum of the ground state X1Σ+, the dispersion coefficients are adjusted for continuous connection to the respective excited atomic asymptote.
Coupling parameters for b B (R) between states B1Π and C1Σ+ in 7LiRb and effective Λ-doubling parameters of q e/f (R) for coupling of distant states with respect to state B1Π.
Pointwise representation of the potential energy curve for the D1Π state of 7LiRb. For interpolation a natural cubic spline through all the listed points should be used. 17 The long range expansion (Eq. (5) ) with coefficients C 6 and C 8 taken from Ref. 16 and C 10 constructed for continuous connection starts at R o = 15.127 Å.
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