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  • 1990-1994  (3)
  • 1975-1979  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Metabolic and toxic behaviours of phthalimide derivatives in albino rat (1978)
    Springer
    Archives of toxicology 40 (1978), S. 255-261 
    Details
    ISSN: 1432-0738
    Keywords: Chloromethyl phthalimide ; Oxymethyl phthalimide ; Phthalimide ; Fetus ; Metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Chlormethylphthalimid, Oxymethylphthalimid und Phthalimid werden verhältnismäßig schnell von der Albinoratte resorbiert. Nach oraler Verabreichung von Chlormethyl- und Oxymethylphthalimid an die Muttertiere ist in den Feten nur das Stoffwechselprodukt Phthalimid nachweisbar. Diese Befunde weisen im Zusammenhang mit Stoffwechseluntersuchungen an isolierten Feten auf einen intensiven Stoffwechsel in fetalen Geweben hin. Unterschiede zwischen dünnschichtchromatographischen und 15N-Untersuchungen lassen vermuten, daß Phthalimid durch Öffnung des Imidringes weiter zur Phthalamidsäure metabolisiert wird.
    Notes: Abstract Chloromethyl phthalimide, oxymethyl phthalimide, and phthalimide are absorbed by the albino rat at a comparatively high rate. Only phthalimide, the metabolic product, will be recordable from fetuses, following oral administration of chloromethyl phthalimide and oxymethyl phthalimide to pregnant rats. Those findings, in conjunction with metabolic studies applied to fetuses isolated by caesarian section, appear to suggest the occurrence of an intensive metabolism in fetal tissue. Certain differences established between results of thin-layer chromatography, on the one hand, and 15N studies, on the other, are likely to support the assumption that phthalimide is further metabolised by splitting the imide ring yielding phthalamic acid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310330
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Characteristics of mass and nuclear charge distributions of229th(nth, f). implications for fission dynamics (1990)
    Springer
    The European physical journal 335 (1990), S. 41-48 
    Details
    ISSN: 1434-601X
    Keywords: 20.00 ; 25.85.Ec
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The mass and nuclear charge distributions of fission fragments from229Th(nth, f) have been measured at several kinetic energies with the mass spectrometer Lohengrin (ILL-Grenoble). The average proton e-o effect, which reaches 41%, induces large oscillations in the parameters of the isotopic charge distribution. A comparison of the data from different fissile nuclei shows the importance of the last stage of the process for intrinsic excitations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289346
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Beta-decay half-lives of neutron rich Cu and Ni isotopes produced by thermal fission of235U and239Pu (1990)
    Springer
    The European physical journal 336 (1990), S. 41-51 
    Details
    ISSN: 1434-601X
    Keywords: 23.40
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The half-lives of very neutron rich isotopes of Ni and Cu have been measured. The isotopes are produced in very asymmetric thermal fission of235U and239Pu at the I.L.L. high flux reactor. They are separated by means of the Lohengrin spectrometer. They are identified with aΔE-E ionization chamber and implanted in one of the 8 Si planar detectors where theβ-particles are also detected. The time correlations between the implantation and the detection ofβ-particles provide the half-life. The values obtained are compared to current theoretical predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01904161
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  • 4
    Electronic Resource
    Electronic Resource
    Experimental studies of the level scheme of143Eu and a generalized decoupling model description (1976)
    Springer
    The European physical journal 277 (1976), S. 129-139 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Excited levels of143Eu have been investigated by nuclear spectroscopy methods. We measured γ-rays and conversion electron singles spectra as well asγγ-coincidences from mass separated143mGd sources (108 s) prepared after the irradiation of144Sm with 78 MeVα-particles. In addition in-beam data were obtained by measuringγ-ray singles spectra, angular distributions andγγ-coincidences, following the144Sm(α, 4n+ p, γ) reaction. A level scheme for143Eu comprising 19 levels is proposed, spin assignments or at least restrictions are given. The deduced experimental level scheme can be reproduced semiquantitatively by a generalized decoupling model which takes into account an asymmetric deformation of the core and a variable moment of inertia. Additionally, the results are discussed in the limit of the weak coupling model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01433704
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  • 5
    Electronic Resource
    Electronic Resource
    Excitation functions of191+193Ir,197Au(6Li, xn+yp) compound nuclear reactions at ELi=48–156 MeV (1977)
    Springer
    The European physical journal 280 (1977), S. 61-72 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Excitation functions of the compound nuclear reactions191+193Ir,197Au(6Li,xn+yp) forx =3–13 andy=0–2 have been investigated by means of in-beamγ-ray spectroscopy at the 156 MeV6Li beam of the Karlsruhe Isochronous Cyclotron. The beam energy has been varied in the range of 48 to 156 MeV in steps of about 10 MeV by Be-absorber foils in the external beam line. Absolute cross sections have been determined by normalizing the measuredγ-ray intensities to the production cross sections ofK- X-rays in the target. The experimental excitation functions are discussed on the basis of predictions of the preequilibrium (hybrid) model. While in most cases the theoretical calculations fairly well reproduce energy position and shapes of the curves, strong discrepancies in the absolute scale of the cross sections are observed. The theoretical predictions overestimate the (6Li,xn) cross sections by a factor of about 6. Conspicuous anomalies have been detected when comparing the (6Li, xn+1(2)p) reactions with (6Li,xn) reactions. The reactions with emission of one or two protons are considerably enhanced. The discrepancies and anomalies observed are tentatively explained by the influence of direct reaction channels as the6Li break-up, which experimentally proved to be the dominant contribution to the total reaction cross section. The enhancement of the reactions with emission of protons may be a consequence of transfer reactions into highly excited states combined with compound nucleus formation thus implying a cluster effect in preequilibrium emission process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01438110
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Beta decay energies and nuclear masses of148Ba,148La and151Pr (1990)
    Springer
    The European physical journal 336 (1990), S. 247-252 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Dr ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Theβ-decay energy of the neutron-rich isotopes148Ba,148La and151Pr has been measured at the Institute Laue-Langevin (ILL). The148Ba- and148La-nuclei were produced using a high-temperature ion source at the OSTIS separator of this institute, whereas samples of151Pr were obtained from the thermal fission of239Pu, used as a target in the mass separator LOHENGRIN. At both instruments,βγ-coincidences were measured with a plastic scintillator telescope and a Ge(I)-detector, together withβ-singles andγ-singles spectra. Theβ-spectra emitted in coincidence with 44γ-lines in the decay of these nuclei have been evaluated. From their endpoint energies, the followingQ β -values have been obtained:Q β (148Ba)=5115±60keV;Q β (148La)=7255±55 keV;Q β (151Pr)=4170±75 keV. Using these results, the nuclear massesA of these nuclei can be calculated with a relative error ΔA/A≃5·10−7. In addition, the two-neutron separation energies and the mass excesses have been derived; the results are compared with recent predictions of theoretical mass calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292853
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    Paper (German National Licenses)
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