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  • Springer  (4)
  • 1980-1984  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    CVL-pumped dye laser for spectroscopic application (1984)
    Springer
    Applied physics 35 (1984), S. 31-36 
    Details
    ISSN: 1432-0649
    Keywords: 42.60 ; 33 ; 36
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A spectroscopic dye laser system-pumped by a Copper Vapor Laser (CVL)-has been built and optimized for different dye solutions operating in the spectral range from 530 to 890 nm. Conversion efficiencies up to 40% were reached in broad band operation, 24% with a prism expander grating cavity, and 20% in grazing incidence configuration, which operated at typical band widths of 3 GHz. Second harmonic generation (SHG) of the dye laser output produced tunable uv-radiation between 260 and 408 nm at conversion efficiencies ≦5%. Fundamental and SHG output were used for resonant ionization experiments in molecular beams.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697518
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Photoionization and fragmentation of alkali metal clusters in supersonic molecular beams (1982)
    Springer
    Applied physics 29 (1982), S. 55-61 
    Details
    ISSN: 1432-0649
    Keywords: 36 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A supersonic molecular beam, pulsed laser and time-of-flight mass spectrometer are arranged together in order to study photo- and auto-ionization, two-photon-ionization and fragmentation processes of alkali clusters as a function of the laser wavelength. In spite of an unfavourable duty cycle, however, the apparatus reaches a considerably higher sensitivity than cw experiments. Alkali clustersM n (n≲21) have been observed and investigated. The well resolved TOF mass spectra are commonly accompanied by significant and broad signals of metastable ions, a phenomenon which cannot be observed by quadrupole mass spectrometry. ParticlesM n (n≲4) have been investigated by twophoton ionization using two different laser wavelengths. Several new electronic transitions for Na3 are found; commonly, however, the excitation and ionization channels are accompanied by strong fragmentation processes. The fragment patterns are very sensitively dependent upon the laser wavelength even when working near the ionization threshold. The results are a strong indication, that the peak intensities of cluster mass spectra cannot easily be related to the intensity distribution of the neutral cluster beam.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694369
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Optische Massenspektrometrie kleinster Metallaggregate mittels 2-Photonen-Ionisation (1983)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 314 (1983), S. 326-331 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Methode der 2-Photonen-Ionisierung wurde erfolgreich an Alkali-Aggregaten zur massenselektiven optischen Spektroskopie eingesetzt. Die dabei erzielte Nachweiswahrscheinlichkeit ist konventionellen Ionisierungsmethoden weit überlegen. Die Spektren ermöglichen Aussagen über Geometrie und Temperatur der untersuchten Partikel. Die Methode erscheint daher sehr geeignet, zerstäubte Neutralteilchen zu analysieren.
    Notes: Summary The method of 2-photon-ionisation has successfully been applied to alcali aggregates for a mass selective spectroscopy. The detection efficiency obtained is by far superior to conventional ionisation methods. The spectra allow conclusions about the geometry and temperature of the investigated particles. Therefore the method seems to be well suited for analyzing sputtered neutral particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00516832
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  • 4
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    Optische Massenspektrometrie kleinster Metallaggregate mittels 2-Photonen-Ionisation (1983)
    Springer
    Details
    Publication Date: 1983-01-01
    Print ISSN: 0016-1152
    Topics: Chemistry and Pharmacology
    Published by Springer
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