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  • 1
    Call number: MOP Per 679(33)
    In: Westfälische geographische Studien
    Type of Medium: Monograph available for loan
    Pages: X, 362 S. : Ill., graph. Darst., Kt. + 6 Kt.-Beil.
    Series Statement: Westfälische geographische Studien 33
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    Frankfurt a.M. : Suhrkamp
    Call number: PIK R 11-11-0286 ; PIK R 11-11-0287
    Type of Medium: Monograph available for loan
    Pages: 316 S.
    Edition: 1. Aufl.
    ISBN: 9783518390474
    Series Statement: Suhrkamp-Taschenbuch 2547
    Location: A 18 - must be ordered
    Location: A 18 - must be ordered
    Branch Library: PIK Library
    Branch Library: PIK Library
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  • 3
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 108 (1998), S. 8004-8011 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The theory of pump–probe diffraction experiments shows that probability density distributions of vibrational wave functions are experimentally observable. In the experiment a laser prepares a molecule in a selected vibrational state, in either the same or a different electronic manifold. The diffraction pattern of the molecule in the excited state is the Fourier transform image of the nuclear probability density distribution, as determined by the vibrational eigenfunction of the molecule. This suggests the possibility to directly observe components of molecular vibrational wave functions. Model calculations illustrate the concept on iodine molecules, and sodium dimers. The relevance to time-resolved pump–probe experiments that prepare vibrational wave packets is discussed. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 99 (1995), S. 2583-2588 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 112 (2000), S. 1260-1270 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Though one normally thinks of single-molecule diffraction studies as tools for eliciting molecular geometry, molecular diffraction patterns are really the Fourier transforms of complete molecular wave functions. There is thus at least the possibility of imaging the vibrational wave functions of polyatomic molecules by means of a pump–probe diffraction experiment: the pump laser could prepare a specific vibrational state and an electron or x-ray could then be diffracted off the molecule some short time later. The present paper develops the general theory of diffraction signatures for individual vibrational wave functions in polyatomic molecules and investigates the feasibility of seeing such signatures experimentally using the example of a linear triatomic molecule modeled after CS2. Although aligned molecules in specific vibrational quantum states turn out to exhibit very characteristic diffraction signatures, the signatures of the vibrational wave functions are partially washed out for the complete isotropy expected from gas phase molecules. Nonetheless, it is possible to design a diffraction experiment using a pump–dump sequence with a polarized laser beam which will select a nonisotropic sample of vibrationally excited molecules. We show that the resulting level of anisotropy should enhance the diffraction signature, helping to distinguish different vibrational components. These model calculations therefore suggest the possibility of observing the dynamics of vibrational wave packets using experimentally realizable diffraction techniques. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Biochemistry 6 (1967), S. 2195-2202 
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 6107-6119 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A time delayed, fully resonant, version of coherent anti-Stokes Raman spectroscopy (CARS) has been used to study intramolecular and intermolecular dephasing in vibrationally excited jet-cooled tetrazine and its van der Waals complexes with argon, krypton, and xenon. When there is 1200 to 2200 cm−1 of vibrational energy in the ground electronic state manifold, the dephasing of all species is dominated by the macroscopic interference associated with the heterogeneous structure of the Q-branch transitions. The observed macroscopic dephasing times are about 300 ps to 2 ns, which implies that the lower limit for the intramolecular dephasing times falls in the same range. The influence of excited state resonances on the dephasing characteristics of these molecules is qualitatively accounted for by formulas derived from the wave packet theory of Tannor, Rice, and Weber.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 6120-6133 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A triple resonance experiment with fluorescence detection has been carried out to investigate the spectroscopy and intramolecular dynamics of the van der Waals molecules s-tetrazine–X (X=Ar, Kr, Xe) with vibrational energies from 1250 to 2210 cm−1 in the ground electronic state (S0). Vibrational band shifts in S0 van der Waals molecules are usually on the order of 1 cm−1, and most relaxation lifetimes are longer than 15 ns. Comparison with published data for intramolecular vibrational redistribution in the S1 electronic state indicates a strong influence of the electronic structure of the aromatic ring on the dissociation dynamics, in clear contradiction to statistical models which have been advanced previously. A perturbation theory treatment supports the existence of a correlation between vibrational band shifts and dissociation dynamics, and rationalizes qualitatively all the peculiar observations for this class of van der Waals molecules.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 83 (1985), S. 6158-6164 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We describe a representation of coherent anti-Stokes Raman spectroscopy (CARS) suitable to the description of time-dependent measurements. This representation includes the standard energy frame formulation as a special case when cw fields are involved. The traditional CARS cw field frequency matching condition ω0=ω1−ω2+ω3 must be generalized for non-cw fields; in that case it refers to the Fourier component at ω0 of the convolution of the radiation field with the wave packet recurrences. The influence of resonance, both in the ground and electronically excited states, on the decay of time delayed CARS signals is discussed. As expected, intramolecular vibrational redistribution on the ground state potential surface of a molecule causes the CARS signal to decay in time. Model calculations show that quantum beats in the CARS signal may be observed, reflecting either a small number of coupled states (strong and regular recurrences) or sequential coupling of states (weak and early recurrences).
    Type of Medium: Electronic Resource
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