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• W3004355818 abstract "The Ã2A1−X̃2B1 electronic transition of the jet-cooled stibino (SbH2 and SbD2) free radical has been observed for the first time using laser induced fluorescence (LIF) detection. The radicals were produced by a pulsed electric discharge through a mixture of stibine (SbH3 or SbD3) in high pressure argon at the exit of a pulsed molecular beam valve. SbH2 exhibits only three LIF bands, assigned as 210, 000, and 201, with a fluorescence lifetime (τ), which decreases from ∼50 ns for 00 to &lt;10 ns for 21. LIF transitions to the 00 (τ ∼ 2 µs), 21 (τ ∼ 400 ns), and 22 (τ ∼ 75 ns) upper vibronic states of SbD2 were also observed. High-resolution spectra exhibited large spin-rotation splittings and small resolved antimony hyperfine splittings due to a substantial Fermi contact interaction in the excited state. The experimentally determined rotational constants gave effective molecular structures of r0″ = 1.724(2) Å, θ0″ = 90.38(7)° and r0′ = 1.693(6) Å, θ0′ = 120.6(3)°. The ground state bending vibrational levels up to eight quanta (6404 cm−1) in SbH2 and 12 quanta (6853 cm−1) in SbD2 were measured from dispersed fluorescence spectra. All indications are that SbH2 undergoes a dissociative process at low vibrational energies in the excited electronic state." @default.
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• W3004355818 date "2020-01-30" @default.
• W3004355818 modified "2023-09-23" @default.
• W3004355818 title "The electronic spectrum of the jet-cooled stibino (SbH₂) free radical" @default.
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• W3004355818 doi "https://doi.org/10.1063/1.5139527" @default.
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• W3004355818 hasPublicationYear "2020" @default.
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