The states 1^1Σ^+_u, 1^1Π_u and 2^1Σ^+_u of Sr_2 studied by Fourier-transform spectroscopy

Abstract

A high resolution study of the electronic states 1^1Σ^+_u and 1^1Π_u which belong to the asymptote 4^1D + 5^1S and of the state 2(A)^1Σ^+_u, which correlates to the asymptote 5^1P + 5^1S, is performed by Fourier-transform spectroscopy of fluorescence progressions induced by single frequency laser excitation. Precise descriptions of the potentials up to 2000 cm^{-1} above the bottom are derived and compared to currently available ab initio calculations. Especially for the state 1^1Σ^+_u large deviations are found. Rather weak and local perturbations are observed for the states 1^1Π_u and 2^1Σ^+_u, while a strong coupling of the state 1^1Σ^+_u to the component Ω=0^+_u of the state 1^3Π_u, which belongs to the asymptote 5^3P + 5^1S, is indicated.

Typing errors corrected (including numbers in table IX), 12 pages, 9 figures

References in corpus (3)

• Precision Test of Mass Ratio Variations with Lattice-Confined Ultracold Molecules
• Fourier-transform spectroscopy of Sr2 and revised ground state potential
• Prospects for application of ultracold Sr${}_2$ molecules in precision measurements

Cited by in corpus (9)

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• A terahertz vibrational molecular clock with systematic uncertainty at the $10^{-14}$ level
• High-precision spectroscopy of ultracold molecules in an optical lattice
• Formation of deeply bound ultracold Sr_2 molecules by photoassociation near the ^1S + ^3P_1 intercombination line
• Ultracold ${}^{88}{\mathrm{Sr}}_2$ molecules in the absolute ground state
• The $A^1{\Sigma }_u^{+}$ + (1)${}^1{\Pi }_u$ system of Mg${}_2$
• Excited electronic states of Sr${}_2$: ab initio predictions and experimental observation of the $2^1{\Sigma }_u^{+}$ state
• Ab initio electronic structure of the Sr${}_2^{+}$ molecular ion