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Determine the pure rotational spectra, structural equilibrium spacing, and induced electric dipole moment of weakly bound neon-argon van der Waals dimers.

January 15, 1995The Journal of Chemical Physics

Rotational spectra and van der Waals potentials of Ne–Ar

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Determine the pure rotational spectra, structural equilibrium spacing, and induced electric dipole moment of weakly bound neon-argon van der Waals dimers.
Measured pure rotational transitions across natural abundance isotopomers using pulsed-jet Fourier-transform microwave spectroscopy inside a Fabry–Perot resonator.
Fitted experimental transitions to model van der Waals potentials alongside ab initio calculations and scattering cross-section data.
Determined the induced electric dipole moment by calibrating polarization pulse durations against an argon-carbon dioxide reference with known Stark splitting.
Obtained ground-state rotational constants for the primary 20Ne–40Ar isotopomer yielding an average zero-point atomic separation of R0 ≈ 360.7 pm.
Derived an equilibrium interatomic separation at the potential well minimum of Re = 348.0(2) pm from fitted model potentials.
Estimated the induced electric dipole moment of the dimer to be μ0 = 7.3(1.6) × 10⁻³³ C m [0.0022(5) Debye].

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Implication

Spectroscopic analysis reveals structural dimensions and dipole moments of neon-argon dimers, improving intermolecular potential models.

Cite This Study

Grabow et al. (1995) studied this question.

synapsesocial.com/papers/6a706ff5e71d69abee089b50 https://doi.org/10.1063/1.468904

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Rotational spectra and van der Waals potentials of Ne–Ar

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Rotational spectra and van der Waals potentials of Ne–Ar

Key Points

Discussion

Implication

Cite This Study

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