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  • 1985-1989  (17)
  • 1975-1979  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Computer simulations of photoionization in ionically bonded clusters (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 5108-5113 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Photoionization spectra of clusters record a continuous distribution of ionization energies because each cluster has a different atomic arrangement at the moment of ionization. Using the technique of molecular dynamics we have generated photoionization spectra for (Cs2O)n clusters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456553
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Observation of electronic shell structure in large cesium oxide clusters (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 2848-2855 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Photoionization spectra of CsnOx clusters have been recorded for 15≤n≤130 and 1≤x≤10. We present a method of interpreting these spectra and a computer algorithm for their evaluation. Several features of these photoionization spectra support the spherical-jellium-background model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455937
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Photoionization spectra of cesium and cesium oxide clusters (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 2979-2991 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Cesium and cesium oxide clusters have been ionized in a one-photon process by means of a tunable cw dye laser and detected in a mass spectrometer. Mass spectra obtained using different photon energies and photoionization spectra of 7 metal and 86 oxidized metal clusters (in a mass range from 1 to 2024 amu and a maximum energy of 3.1 eV) are presented. Vertical ionization potentials were determined from the spectra. The interpretation of the ionization threshold is given in terms of the displaced harmonic oscillator model which leads to a relation between adiabatic and vertical ionization potentials (IP). The ionization energies of cesium clusters Csn decrease with cluster size. An unusually low IP was observed for the enneamer Cs9 and for the cesium monoxide Cs11O. With increasing oxidation of the cesium metal clusters the IP decreases (suboxides) reaches a minimum at Cs(Cs2O)n and then increases (superoxides).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455899
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Mass spectra of Ca–O and Ba–O clusters (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 6664-6667 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Mass spectra of metal-rich, singly and doubly ionized BanOx clusters are characterized by high peak intensities for n=13, 19, 23, 26, 29, 32, and 35 independent of the number of oxygen atoms (x=1,2,3,4). These values are identical to the magic numbers found for Ar clusters. The mass spectra of CanO show a similar behavior. Mass spectra of stoichiometric, doubly ionized [Ca(CaO)n]++ clusters are characterized by low peak intensities for n=14, 24, 32, 38, 40, 50, and 64. These values correspond to unstable clusters formed by the addition of one Ca atom or one CaO molecule to a closed rectangular block of atoms with rock salt structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456285
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Photoionization spectra of CsnOm⋅(CO)x clusters (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 7451-7454 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: One-photon ionization spectra are reported for 82 clusters with the composition CsnOm⋅CO and CsnOm⋅2CO. These spectra are presented in the form of an energy distribution of ionizing transitions. Carbon monoxide apprears to react with CsnO clusters to form CO2−2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457268
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  • 6
    Electronic Resource
    Electronic Resource
    High-resolution time-of-flight mass spectrometers: Part I. Effects of field distortions in the vicinity of wire meshes (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 347-349 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Field distortions in the vicinity of wire meshes can change the direction of passing ions. Small deflection angles of ions passing through wire meshes in the reflector can reduce the mass resolution of time-of-flight mass spectrometers. We calculate these effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140436
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  • 7
    Electronic Resource
    Electronic Resource
    High-resolution time-of-flight mass spectrometer (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 792-793 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: To perform experiments with clusters, a time-of-flight mass spectrometer with a mass resolution of 35 000 (m/Δm, 50% definition) has been constructed. The main design features of the instrument are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1141022
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Solvation in clusters: lithium iodide in alcohol (1987)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 91 (1987), S. 2530-2533 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100294a018
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    AXIAL MUSCULATURE IN THE DOLPHIN (TURSIOPS TRUNCATUS): SOME ARCHITECTURAL AND HISTOCHEMICAL CHARACTERISTICS (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 1 (1985), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: In view of the supposition that a dolphin can swim faster than would be predicted based on its physical features and presumed muscle power potential, studies were initiated to reevaluate the assumptions made in reaching these conclusions. Several previous studies have shown that the architectural and histochemical properties of a skeletal muscle dictate its force, velocity and displacement properties. This study examined the muscle fiber lengths and tendon arrangements of the dorsal and ventral axial muscles in dolphins (Tursiops truncatus). Fiber type and fiber size distributions were determined to reflect the general biochemical characteristics of the musculature. The dorsal muscles had a higher mean fiber length (167 Vs. 90 mm) and the range within and across different dorsal muscles was less (141–199 vs. 37–185 mm) than in the ventral muscles. Both the dorsal and ventral muscles consisted of an overall mean of 50 percent slow twitch and 50 percent fast twitch fiber types. The fast twitch fibers were 67 percent larger (2,200 vs. 1,317 μm2) than the slow twitch fibers in the ventral and 38 percent larger (1,213 Vs. 879 μm2) in the dorsal muscles. In addition, the mean cross sectional area of the fibers in the ventral muscles was approximately 65 percent greater (1,750 vs. 1,072 μm2) than those in the dorsal muscles. The shorter, larger-diameter fibers of the ventral musculature give it a greater potential for force production for a given amount of muscle mass. In contrast, the dorsal muscles appear to be designed to optimize velocity and displacement, (i.e., longer fibers). These findings contribute to the information necessary for the determination of the power potential of the musculature of the dolphin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1985.tb00019.x
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Compound clusters. II. Intermetallics and phosphides (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 83 (1985), S. 78-84 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Compound clusters composed of two metallic elements have been produced by allowing the elements to react in the vapor phase. The composition of the clusters could be varied by changing the relative partial pressures of the two vapors. Mass spectrometry indicates that clusters with certain well defined compositions are particularly stable. For example, in the Cs–Sn system, mass peaks corresponding to (Cs3Sn2)+, (Cs3Sn5)+, (Cs5Sn4)+, and (Cs5Sn9)+ are unusually strong. Other metallic systems discussed are Pb–Cs, Pb–In, Pb–Sr, Pb–In, and In–Cs. In another series of experiments each of these elemental metallic vapors was allowed to react with phosphorus vapor. In this way the relative stability of the various phosphide clusters could be tested. For example, (Cs4P7)+ and (Cs3P4)+ are shown to be particularly stable. The probable structures of some of the intermetallic and phosphide clusters are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.449795
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    Paper (German National Licenses)
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