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  • 1
    Electronic Resource
    Electronic Resource
    Anharmonic asymmetric oscillator: A classical and quantum treatment (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 5128-5131 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The nonrelativistic anharmonic–asymmetrical–oscillator (AAO) is studied in full. The classical equation of motion is solved using Jacobi elliptic functions which have both real and imaginary periods. The imaginary period is connected with the imaginary part of the energy in quantum mechanics. The resonances (Siegert states) are calculated in the JWKB approximation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451706
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  • 2
    Electronic Resource
    Electronic Resource
    Activity ratios of natural uranium in surface waters (1988)
    Springer
    Journal of radioanalytical and nuclear chemistry 126 (1988), S. 419-427 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The enrichment of234U in ground waters is a well established experiments fact. In the course of measurements of uranium contamination in rivers of the Guadiana basin we have found the contamination near the uranium mines with the equilibrium isotope ratios of uranium. With distance from the mines we found not only the expected decrease in contamination but also an increasing enrichment of the lighter isotopes. For the235U isotope, this is the first observation with good separation and low interference between the most significant peaks of each isotope.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164545
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  • 3
    Electronic Resource
    Electronic Resource
    Natural isotopic separation of uranium in the Guadiana basin (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 118 (1987), S. 291-298 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In the course of measurements of uranium contamination in rivers of the Guadiana basin we have found the logical contamination near the uranium mines and a234U/238U ratio near 1 in the neighbourhood of the sources. With distance we find not only the expected decreasing contamination but also higher values of the activity ratio234U/238U. This observation seems to contradict the usual explanation of preferential leaching of234U as origin of the general234U enrichment of ground water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02167375
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  • 4
    Electronic Resource
    Electronic Resource
    Seasonal variation of activity ratios for natural uranium in surface waters (1989)
    Springer
    Journal of radioanalytical and nuclear chemistry 134 (1989), S. 73-86 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The uranium concentration, and234U/238U and235U/238U activity ratios were measured by alpha spectrometry of surface water from the neighbourhood of the uranium mines “El Lobo” and “El Pedregal” (Badajoz, Spain) before and after the rainy season. Changes were observed in all the three parameters studied. Leaching and dilution are the probable mechanisms for the seasonal changes in the concentration and in the234U/238U activity ratio as measured in open and dynamic systems (rivers).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02047272
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