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  • American Institute of Physics (AIP)  (26)
  • Blackwell Publishing Ltd  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Survival, relaxation, and excitation of vibrational energy during the scattering of NO molecules from a graphite surface (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 6701-6708 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The rotational, angular, and translational scattering behavior of NO molecules prepared in a single ro-vibrational state before their interaction with a cleaved graphite surface was determined (v=1→v=1 process). Moreover, the deactivation probability of the vibrational energy into the rotational and translational motion of the molecule could be evaluated (v=1→v=0 process). Finally, it was possible to investigate the scattering behavior of NO molecules that experienced vibrational excitation during their surface encounter (v=0→v=1 process).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456289
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  • 2
    Electronic Resource
    Electronic Resource
    Elementary processes in the scattering of NO molecules from a diamond surface (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 4368-4376 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report on the scattering of supersonic NO molecules from a diamond (111) surface. Using state selective laser techniques combined with mass selective quadrupole measurements, we observe two novel features in the molecule–surface interaction: first, a scattering behavior which is dependent on the direction of the incoming molecules; and second, surface residence times that are unusually long, but temperature independent. The former observation can be traced back to the topography of the unreconstructed diamond (111) surface, the latter one can be understood when a temporary function of a metastable surface–molecule complex is assumed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.459672
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  • 3
    Electronic Resource
    Electronic Resource
    The emission spectrum of helium hydride. I. Bands near 8000 A(ring) (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 3442-3453 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Spectra of helium hydride were observed after neutralization of a mass-selected HeH+ beam. The molecules were produced in a fast beam, and so a special setup had to be used to avoid Doppler broadening and a careful calibration procedure had to be applied to determine the line positions and linewidths. In an earlier paper, we reported the first observation of a discrete spectrum of helium hydride, which was discovered by means of an emission band near 8000 A(ring). In this paper, a detailed analysis of this band for all four stable isotopic mixtures is given. For the deuterides several vibrational bands were observed, which allowed equilibrium molecular constants to be determined. These constants agree with the results of recent ab initio calculations. The similarity of these constants to those of HeH+ in the ground state confirms that the observed states are Rydberg states. Comparison of the molecular constants for different isotopic mixtures shows deviations from the Born–Oppenheimer approximation. Born–Oppenheimer breakdown parameters were derived. Both the upper and lower states show predissociation to the repulsive ground state of helium hydride. The line intensities give evidence of a dependence of the electronic transition moment on the interatomic distance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454914
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  • 4
    Electronic Resource
    Electronic Resource
    Experiments with Single Atoms in Cavities and Traps (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 755 (1995), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1995.tb38963.x
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  • 5
    Electronic Resource
    Electronic Resource
    Photoacoustic study of layer thickness and moisture content from varnished packaging materials (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 4124-4127 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By means of a photoacoustic gas-cell technique we estimated the thickness of varnish layers on base paper. Interpretation of the measurements was supported by a theoretical model which describes the packaging material as a multilayer stack with freely eligible thermal and optical properties. The variable moisture content could be taken into account using mixture formulas for the definition of thermal effusivity and thermal diffusivity at different percentages of water. Satisfying correspondence between photoacoustic phase slope measurements and calculations simulating water migration was able to be achieved. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1350628
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  • 6
    Electronic Resource
    Electronic Resource
    Definition, resolution, and contrast in photothermal imaging (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 3759-3764 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Photothermal imaging can be described quantitatively by means of a point spread function (PSF), which represents the image of a buried thermal point defect. From this PSF conclusions can be drawn about amplitude and phase contrast, half-width, and resolution of photothermal imaging. The theoretical findings are stated by measurements from an appropriately designed model sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352270
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  • 7
    Electronic Resource
    Electronic Resource
    Experimental results of photothermal microstructural depth profiling (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 4108-4111 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Experimental results of thermal conductivity depth profiling of case-hardened steel and mechanically loaded ceramics are presented, based on an inversion algorithm for a sample with piecewise linearly inhomogeneous depth profile of the thermal conductivity. The photothermally obtained profiles are interpreted or compared with results from conventional or destructive measuring techniques. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359869
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  • 8
    Electronic Resource
    Electronic Resource
    Analysis of the detectability of buried inhomogeneities by means of photothermal microscopy (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 4396-4401 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Calculated photothermal contrast functions arising from lateral scanning of buried stripe- and disk-shaped deviations in thermal conductivity k are presented. From the theoretical findings the measuring conditions are derived in terms of the modulation frequency for which optimal photothermal discrimination of subsurface thermal inhomogeneities can be achieved. The theoretical results have been verified experimentally be measuring model samples, in which localized inhomogeneities were embedded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355983
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  • 9
    Electronic Resource
    Electronic Resource
    Optical mixing of CO2-laser radiation in a scanning tunneling microscope (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 6477-6480 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Two infrared laser beams coupled into the tunneling junction of a scanning tunneling microscope lead to the generation of a signal at the difference frequency. In this article it is described that two different frequency mixing mechanisms are responsible for this process. One part of the signal is generated through a mixing process owing to the nonlinearity in the static current-voltage characteristic. Another part has its origin in a nonlinear susceptibility at the surface; it therefore corresponds to frequency mixing in nonlinear optics. It will be shown that the difference-frequency signals generated by the two processes can be separated owing to their different dependence on the tip-sample distance. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360533
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  • 10
    Electronic Resource
    Electronic Resource
    Systematic errors of locally resolved photothermal radiometric measurements (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 84 (1998), S. 1163-1167 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thermal properties and thermal depth profiles can be estimated in principle from laterally resolved radiometric measurements. Care has to be taken to prevent signal distortions due to systematic measurement errors. The effects of scattering of the heating beam from the rough sample surface and of infrared diffraction at the collecting optics have been discussed with respect to the photothermal signal. An experimental evaluation is given. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.368180
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