JR
Jörg Reuss
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6 records found
1
Journal article
(1985)
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M. Snels, J. Geraedts, S. Stolte, J. Reuss
Dimers can often be treated as prolate symmetric tops, with their symmetry axis along the dimer axis. In that case, thermal excitation results in J, MJ ≫ K if the moment of inertia around the dimer axis can be assumed much larger than the moment of inertia along an axis perpendicular to it. Expressions are derived which describe the near saturation behaviour of perpendicular and parallel excitations; for J, MJ ≫ K, simple analytical expressions are obtained.
...
Dimers can often be treated as prolate symmetric tops, with their symmetry axis along the dimer axis. In that case, thermal excitation results in J, MJ ≫ K if the moment of inertia around the dimer axis can be assumed much larger than the moment of inertia along an axis perpendicular to it. Expressions are derived which describe the near saturation behaviour of perpendicular and parallel excitations; for J, MJ ≫ K, simple analytical expressions are obtained.
Journal article
(1984)
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J. Geraedts, M. Snels, S. Stolte, J. Reuss
IR predissociation spectra of SiF4 and CF3Br clusters have been studied by attenuating a molecular beam with a line-tunable cw CO2 laser. T.
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IR predissociation spectra of SiF4 and CF3Br clusters have been studied by attenuating a molecular beam with a line-tunable cw CO2 laser. T.
Journal article
(1983)
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J. Geraedts, S. Stolte, J. Reuss
A careful discussion of Fermi resonances is shown to explain qualitatively the many observed line shifts from molecular-beam infrared predissociation experiments.
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A careful discussion of Fermi resonances is shown to explain qualitatively the many observed line shifts from molecular-beam infrared predissociation experiments.
Journal article
(1982)
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J. Geraedts, S. Stolte, J. Reuss
IR photo-dissociation spectra of SF6 clusters have been studied. A He-seeded molecular beam has been attenuated by crossing it with a line tunable cw CO2 laser of moderate power. - In the electron bombardment beam ionizer (Eel=100eV) small neutral clusters are found to fragment predominantly to the main monomer mass (SF5+). - Predissociation spectra have been calculated for clusters containing up to six SF6-molecules invoking the dipole-dipole resonance force to lift the degeneracy of the molecule - excited molecule interaction. On the basis of these spectra, dimer and trimer concentrations have been determined quantitatively, for different molecular beam conditions.
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IR photo-dissociation spectra of SF6 clusters have been studied. A He-seeded molecular beam has been attenuated by crossing it with a line tunable cw CO2 laser of moderate power. - In the electron bombardment beam ionizer (Eel=100eV) small neutral clusters are found to fragment predominantly to the main monomer mass (SF5+). - Predissociation spectra have been calculated for clusters containing up to six SF6-molecules invoking the dipole-dipole resonance force to lift the degeneracy of the molecule - excited molecule interaction. On the basis of these spectra, dimer and trimer concentrations have been determined quantitatively, for different molecular beam conditions.
Journal article
(1982)
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Jo Geraedts, Martin Waayer, Stephen Stolte, Jörg Reuss
Measurements of vibrational predissociation of SF6 clusters are discussed and compared with theoretical spectra. Attention is given to the line-shape and saturation behaviour as influenced by spatial averaging effects. Also isotopic dimers are considered. Hyperfine-structure measurements of H 2-H2, H2-Ne, H2-Ar and H 2-Kr dimers are dealt with, and information from these results concerning the intermolecular potentials is discussed.
...
Measurements of vibrational predissociation of SF6 clusters are discussed and compared with theoretical spectra. Attention is given to the line-shape and saturation behaviour as influenced by spatial averaging effects. Also isotopic dimers are considered. Hyperfine-structure measurements of H 2-H2, H2-Ne, H2-Ar and H 2-Kr dimers are dealt with, and information from these results concerning the intermolecular potentials is discussed.
Journal article
(1981)
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J. Geraedts, S. Setiadi, S. Stolte, J. Reuss
Dimer predissociation is sensitively detected as attenuation of the SF+5 ion signal from a SF6 molecular beam crossed by a line tunable cw CO2 laser. The dimer spectra show a double peak structure which is assigned to the symmetric and anti-symmetric combination of the v3 vibration. The minimum observed linewidth is 3 cm-1 fwhm.
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Dimer predissociation is sensitively detected as attenuation of the SF+5 ion signal from a SF6 molecular beam crossed by a line tunable cw CO2 laser. The dimer spectra show a double peak structure which is assigned to the symmetric and anti-symmetric combination of the v3 vibration. The minimum observed linewidth is 3 cm-1 fwhm.