Hyperfine splitting of the 1 3Δg Rydberg state of 7Li2

Abstract

Articles you may be interested inHyperfine structures of the 7Li2 b 3Π u , 23Π g , and 33Π g states: Continuous wave perturbation facilitated optical-optical double resonance spectroscopy Perturbation facilitated optical-optical double resonance spectroscopy of the 23Σ+ g , 33Σ+ g , and 43Σ+ g Rydberg states of 7Li2Identification of the 3dπ1Δ g and 3Δ2g Rydberg state of O2 by multiphoton ionization and polarization studies J. Chem. Phys. 92, 61 (1990); 10.1063/1.458412 A spectroscopic study of the 11Πg state of 7Li2 AIP Conf.

Enhanced Access to the Dark Triplet States of 7Li2 through New Singlet–Triplet A1Σ+u ∼ b3Πu Perturbation Window Levels: Perturbation-Facilitated Optical–Optical Double Resonance Study of the 23Σ+g State

“…Almost all of the information about the 2 3 ⌺ g ϩ , 3 3 ⌺ g ϩ , 2 3 ⌸ g , 3 3 ⌸ g , 1 3 ⌬ g , 1 3 ⌺ g Ϫ triplet states in 7 Li 2 has been obtained by PFOODR via the first three singlet-triplet mixed pairs (3, 4, 8 -14). In all cases, except the 2 3 ⌸ g state, the data set is limited and spans over several rovibrational levels only. Thus the derived molecular constants and potential energy curves are not likely to be very accurate outside the narrow energy range covered by the experimental observations.…”

“…One such technique is the perturbation-facilitated optical-optical double-resonance (PFOODR) fluorescence excitation spectroscopy used here to study the 2 3 ⌺ g ϩ state of 7 Li 2 . The ground state of alkali molecules is of 1 ⌺ g ϩ symmetry.…”

“…The PFOODR method, introduced by Li and Field in 1983 (1), is based on the existence of mutually perturbed A 1 ⌺ u ϩ (vЈ A , JЈ) ϳ b 3 ⌸ u (vЈ b , JЈ) pairs of levels. As a result of the spin-orbit interaction, each member of the pair acquires both singlet and triplet character and can be used as a "window" level (2)(3)(4) to observe the high-lying "dark" triplet states.…”

“…Only three mixed A 1 ⌺ u ϩ ϳ b 3 ⌸ u pairs of levels of 7 Li 2 were known prior to this study. Most of the knowledge about the 2 3 3 ⌺ g Ϫ high-lying triplet states has been acquired by PFOODR excitation spectroscopy via these window levels (3, 4, 8 -14). Unfortunately, the limited number of singlet-triplet window levels leads to a small data set because of limitations due to Franck-Condon factors (FCF) and laser dye range.…”

The 43Πg State of Na2: Vibrational Numbering and Hyperfine Structure

“…With the development of narrowband lasers, it has become possible to observe the hyperfine splitting in the excited states of various alkali diatomic molecules with great accuracy. The hyperfine structure of the 2 3 ⌸ g , 3 3 ⌸ g (12,13), (16), and b 3 ⌸ u (17,18) states of Na 2 , and the 2 (21), and 1 3 ⌬ g (8,20) states of 7 Li 2 has been resolved by cw PFOODR spectroscopy.…”