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  • 1
    Electronic Resource
    Electronic Resource
    Pulsed 469.4 nm hollow cathode He-Kr laser (1989)
    Springer
    Applied physics 49 (1989), S. 343-347 
    Details
    ISSN: 1432-0649
    Keywords: 42.55F ; 42.60B
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Design principles, construction and operation characteristics of a pulsed 469.4 nm He-Kr laser are described. The laser was operated in a 20 cm active length transverse hollow cathode discharge and was excited by 50 Hz repetition rate 0.1–1 ms duration square wave current pulses. Cataphoresis of Kr ions was found to play an important role in forming the laser pulse shape. By increasing the voltage a considerable increase of peak laser power occurred, the maximum power obtained was 80 mW. The sealed-off laser was operated using 400 μs, 4 A current pulses, pulsed laser power being 20 mW, average power 0.4 mW, respectively. The lifetime of the laser was 440 h, tube failure being due to gas cleanup caused by cathode sputtering.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324184
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Endoergic and resonant charge transfer excitation in He-Cu discharge (1987)
    Springer
    Applied physics 44 (1987), S. 71-74 
    Details
    ISSN: 1432-0649
    Keywords: 34 ; 42.55C ; 52
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The intensity of Cu-II lines with upper level energies near and above those of the He ion was measured as a function of He pressure in a Cu hollow cathode tube. In this tube at low pressures the negative glow could expand above the cathode. The maximum intensity of the Cu-II 493.1 nm line was found in the low voltage, high pressure hollow cathode discharge region in accordance with a resonant charge transfer excitation process. Enhancement of the intensity of the Cu-II 436.5 nm and 417.9 nm lines was observed in the cathode glow at low pressures. Excitation of these lines is attributed to endoergic charge transfer collisions between He ions accelerated by the 2 kV tube voltage and ground state Cu atoms. The cross-section for this reaction exciting the 436.5 nm line was estimated to be of the order of 10−17 cm2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00693988
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Organization of the multifunctional neural network regulating visceral organs inHelix pomatia L (Mollusca, Gastropoda) (1987)
    Springer
    Cellular and molecular life sciences 43 (1987), S. 965-972 
    Details
    ISSN: 1420-9071
    Keywords: Helix pomatia L ; neural network ; habituating and non-habituating neurons ; interaction of neurotransmitters and peptides ; FMRFamide ; opiate peptides ; morphine ; ACh ; 5HT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary InHelix pomatia L. the overlapping neuronal network was found to regulate the visceral functions (e.g. cardiorenal, respiratory and genital functions). The neural network is organized around the multifunctional interneurons, which take part in forming both afferent and efferent pathways. The interneurons are sensitive to a wide range of neurotransmitters or transmitter candidates including low molecular weight substances (ACh, 5HT, DA, octopamine, glutamate) and several oligopeptides. In this system both selection of information and modification of membrane properties (for example habituation) are carried out by a combination of simultaneously liberated active agents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952211
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Photodissociation of neutral argon clusters with visible laser light: new experimental evidence (1989)
    Springer
    The European physical journal 13 (1989), S. 179-180 
    Details
    ISSN: 1434-6079
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Recently we have observed [1–4] photodissociation of neutral van der Waals clusters induced by visible laser light using coaxial interaction between the beams. Because of possible artifacts we have repeated here this experiment in a crossed beam configuration. The present results confirm the occurrence of this photodissociation effect. We suggest tentatively that excitation via Raman scattering is the origin of this phenomenon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01398588
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    Paper (German National Licenses)
    Fulltext
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