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  • Artikel  (4)
  • 33.80.Wz  (1)
  • 42.50  (1)
  • 42.60.Da  (1)
  • 42.60.Fc  (1)
  • Chemistry  (1)
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  • Artikel  (4)
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  • 1
    Digitale Medien
    Digitale Medien
    Independently controllable multiline emission from a TEA CO2 laser (1984)
    Springer
    Applied physics 35 (1984), S. 123-126 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.50 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Spatial separation of wavelengths in a CO2-laser resonator helps to avoid competitions. We have achieved this by means of a nearly concentric resonator with a grating or prism in its center. Thus, we demonstrated independent multiline emission with a variety of output spectra. The temporal sequence of the lines was conveniently controlled by varying their losses.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697699
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Multiwavelength Q-switched CO2 laser with continuous discharge (1992)
    Springer
    Applied physics 55 (1992), S. 65-70 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.60.Da ; 42.60.Fc
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A low-pressure (20 mbar) CO2 laser allows to extract pulses at several selected wavelengths simultaneously from the same active medium. We demonstrated this, using an industrial laser modified by a Q-switch and a resonator with two branches. In one branch the wavelengths are spatially separated, whereas in the other they oscillate in one common transverse mode. We designed a multi-wavelength resonator which requires a single additional reflector compared to usual laser cavities. It provided tunable oscillation at six wavelength simultaneously.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00348616
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Isotopically selective IR multiphoton dissociation of 1,3,5-trioxane (1996)
    Springer
    Applied physics 62 (1996), S. 203-212 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33.80.Wz
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Searching for oxygen-isotope selectivity, we investigated the infrared multiphoton dissociation of the formaldehyde trimer around 10 µm, in a range where the molecule has a degenerate and a non-degenerate CO stretch vibration and a degenerate CH2 deformation vibration. In the region of the two latter, the wavelength dependence of the dissociation yield exhibits sharp structures. They were assigned ton-photon resonances (n = 2, 3, 5) by the help of the IR spectrum in the fundamental and overtone region. The O and C selectivities were very small (1.05) near the non-degenerate CO stretch band, but surprisingly large (2–4) in the CH2 deformation, which has no isotopic shift. The selectivity is not controlled by the first (n-photon) excitation step, but only by a later step. Its assignment is attempted. The pressure dependence of the dissociation is peculiar: Only after an initial decrease, the yield exhibits the usual rise with pressure. We attribute the decrease to a relaxation which perturbs the two-photon resonance.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081126
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Ueber das Brucin (1840)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 19 (1840), S. 510-511 
    Details
    ISSN: 0021-8383
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/prac.18400190185
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