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  • 1975-1979  (2)
Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 293 (1979), S. 187-201 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract K-, L andM-shell ionization cross sections have been measured for 23 elements, 12≦Z≦92, after bombardment with relativistic electrons, 15≦E 065MeV, by means of high resolution semiconductor detectors and a recently developed gas-scintillation proportional counter. For constant electron bombarding energyE 0 the ionization cross sections follow a power law dependence,σ∽Z −α, and forE 0=50MeV we deducedα =2.45±0.02 for theK shell andα=3.00 ±0.09 for theL shell. The observedZ dependence exhibits significant systematic deviations from theoretical predictions which exceed the experimental values up to 15 % at lowZ elements for theK shell and on the average about 11% for theL andM shell. The same behaviour of too low experimental values, i.e. an overestimation by the theory, is observed for the energy dependence of the cross sections for all shells. A scaling behaviour describing theZ andE 0 dependence for allK-, L andM-shell data points is observed which also predicts the experimental values by other groups at lower and higher energies correctly. The comparsion of the measuredLΒ/Lα, andLγ/Lα intensity ratios for highZ elements with the values obtained by other groups in the energy range 0.3≦E0≦1,000 MeV exhibits an increase with bombarding energy that cannot merely be explained by the energy dependence of the subshellionization cross sections for theL shell. An attempt to explain this effect with the change of the Coster-Kronig transition probability is described.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 447 (1978), S. 161-170 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thermal Properties and Formation of Hydrates of CoX2 · 2C5H5N (X : Cl-, Br-, I-)The thermal decomposition of the compounds CoX2 · 2C5H5N (X : Cl-, Br-, I-) is reinvestigated. CoBr2 · C5H5N is described for the first time. In an atmosphere saturated with water vapor CoX2 · 2C5H5N (X : Cl-, Br-) reacts to CoX2 · 2C5H5N · 4 H2 O (X : Cl-, Br-). The thermal, magnetic, and UV spectroscopic properties of these compounds are communicated.
    Notes: Der thermische Abbau der Verbindungen CoX2 · 2 C5H5N (X : Cl-, Br-, J-,) wird erneut untersucht. Dabei läßt sich das bisher unbekannte, CoBr2 · C5H5N isolieren. In einer mit Wasserdampf gesättigten Atmosphäre werden CoX2 · 2C5H5N (X : Cl-, Br-,) zu den isostrukturellen Hydraten CoX2 · 2C5H5N · 4 H2 (X : Cl-, Br-,) umgesetzt. Das thermische magnetische und UV-spektroskopische Verhalten dieser Verbindungen wird ebenfalls mitgeteilt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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