Selective Spectrum Simplification by Laser Level Labeling

Observation of the 7Πg State of Na2 by Optical−Optical Double Resonance Spectroscopy

“…For instance, the value of T e is 36 634.01 cm -1 for the 6d 1 Π g state in Carlson's work. 11 We have started with a set of ∼200 data points (tentatively assigned J values to the PR lines) in the T(V, J) vs [J(J + 1) -Λ 2 ] plot. This plot also helps as a tool to predict the progressions that have not been picked out or are missing, rather than only as an initial checking of the J assignments.…”

“…In particular, the Na 2 system has been studied for understanding different types of interactions playing important roles in diatomic molecules and to search for the answers to many intriguing questions about the fundamental physical properties of atoms and molecules. Researchers have carried out many works in investigating Na 2 using high level ab initio calculations 1,2 and experimental techniques [3][4][5][6][7][8][9][10][11][12][13][14][15] that involve many interesting and unusual features of the interactions.…”

“…Recently, a relabeling and classification of 84 Rydberg states with dissociation limits up to Na(3s) + Na(5p) have been reported by J. Li et al 16 Neither of the nd-series ( 1 Π g , 1 ∆ g ) corresponding to Na(3s) + Na(nd) asymptotes has been investigated extensively. Using two-step polarization labeling spectroscopy, Carlson et al 11 has reported five-parameter fit molecular constants (Dunham coefficients) of the nd 1 Π g -series (n ) 6 -9) in the range of 0 e V e 7 and 19 e J e 41, and the nd 1 ∆ g -series (n ) 6 -12) in the range of 0 e V e 3 and 19 e J e 41. They found that the estimated error of the fit was 0.3-0.4 cm -1 .…”

“…Magnier et al 1 calculated the potential curves of the states of Na 2 up to the separated atom limit of (3s + 5p). The state that is assigned to the 7 1 Π g state by them is assigned to the 6d 1 Π g state by Carlson et al 11 A high-resolution twophoton experimental technique "optical-optical double resonance" (OODR) spectroscopy is based on the simultaneous interaction between a molecule (or an atom) and two photons that are on resonance to two molecular (atomic) transitions involving certain energy levels. In this article, we report the OODR spectroscopic observation of the 7 1 Π g state, the molec-ular constants, and experimental Rydberg-Klein-Rees (RKR) potential curve of that state.…”

Perturbation and Predissociation near the Dissociation Limit of the BΠ State of 23Na39K

“…1 In our previous report, 2 Doppler-free high-resolution spectra of the B 1 Π(V′, J′ ) 16 and 18) r X 1 Σ + (V′′ ) 4, J′′ ) 17) transitions up to V′ ) 43 were measured by the technique of optical-optical double resonance polarization spectroscopy (OODRPS). [3][4][5] Remarkable line broadenings were observed for transitions higher than the dissociation energy to Na(3s 2 S 1/2 ) + K(4p 2 P 1/2 ) atoms, and the broadenings were identified as originating from the predissociation to Na(3s 2 S 1/2 ) + K(4p 2 P 1/2 ) atoms. The predissociation was shown to be caused by the spin-orbit interaction between the B 1 Π and c 3 Σ + states.…”