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• W2049479933 abstract "The nd Δ1g (n=6, 7, and 8) Rydberg states of Na2 correlating with the asymptotic limits of Na(3s)+Na(nd) have been observed using high-resolution cw optical-optical double resonance spectroscopy corresponding to the rovibrational transitions X Σ1g+(v″,J″)+hνpump→B Π1u(v′,J′)+hνprobe→nd Δ1g(v,J). Totals of 104, 83, and 45 identified rovibrational e/f-parity levels in the ranges of v=0–11, 11≤J≤83; v=0–10, 11≤J≤83; and v=0–10, 11≤J≤65, have been assigned to the 6d Δ1g, 7d Δ1g, and 8d Δ1g states, respectively. Using the observed quantum levels, molecular constants were determined from the Dunham fits of the e-parity levels and the Rydberg–Klein–Rees potential curves were constructed for the nd Δ1g(n=6–8) states. The characteristics of the estimated Λ-doubling splitting constants (q0, qv, and μ) with n(=5–8) of the nd Δ1g series have been explored. Detailed investigations reveal that the nd Δ1g(n=6–8) states involve L uncoupling from the internuclear axis and each of these states is affected by an asymmetric perturbation caused by the up and down adjacent states. The rotational-branch intensity and position anomalies in the observed spectra of the nd Δ1g series (n=5–8) of Na2 lead to the conclusion that due to the effects of the L-uncoupling perturbations, the same l complexes approaching the same ion-core limits result in the same l-mixing processes which lead to the formation of the supercomplexes due to the anisotropy of the molecular-ion [Na2+(3s)] field. This would open up opportunities to study the effects of L uncoupling and perturbations in the nd series and high Rydberg states of other alkali dimers." @default.
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• W2049479933 date "2008-07-10" @default.
• W2049479933 modified "2023-09-26" @default.
• W2049479933 title "Observation of the nd Δ1g (n=6, 7, and 8) Rydberg states of Na2 by optical-optical double resonance spectroscopy: L uncoupling and perturbations" @default.
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• W2049479933 doi "https://doi.org/10.1063/1.2952671" @default.
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