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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 234 (1970), S. 465-471 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The Larmor precession of the first excited state of172Yb has been measured by perturbedγγ-angular correlations in a liquid source at two different temperatures. By a comparison with theg-factor of this state directly obtained by other experiments the corresponding paramagnetic correction factors were deduced to beβ(20 °C)=2.61±0.27 andβ(33 °C)=2.43±0.27. For the ions Sm3+, Dy3+ and Er3+ the paramagnetic correction factors have been calculated from experimental data given in literature.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 260 (1973), S. 57-66 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract At external magnetic fields between 1.3 and 22.5 kG the integral αγ-angular correlations of theO +(α)2+(γ)O + cascades from the ground states of228Th and224Ra respectively implanted into iron and aluminum lattices have been studied. The data were analyzed assuming different additional time dependent and static perturbations. The rotation of the angular correlation for Ra in Al proved independent of these assumptions. Therefore ag-factor of the 84.4 keV 2+ state in224Rag=0.46 (11) could be derived. Although static electric interactions seem the most probable cause for the attenuations observed for Ra and Rn implanted into Fe it was found that the two parameter Abragam and Pound theory better reproduces the data than the one parameter static perturbations. Therefore the hyperfine fields experienced by Ra and Rn in Fe were derived using Abragam and Pound theory to beH HF(RaFe)=−127(31) kG andH HF(RnFe)=1095 kG.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 269 (1974), S. 265-267 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The static electric quadrupole interaction of140Ce and204Pb has been studied in polycrystalline PbTiO3 at the lead site with the time-differential perturbed angular correlation (TDPAC) method. The interaction frequencies areω Q(2083 keV;140Ce)=2.11 (17) MHz andω Q(1274keV;204Pb)=3.60(3) MHz. The results are compared with the electric field gradient calculated in a point charge model. Under the assumption that the covalent contributions for Ce and Pb are equal, one can derive the quadrupole moment of the 1274 keV state of204Pb to be ¦Q¦=0.68 b.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 266 (1974), S. 397-404 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The nuclide95Sr was isolated by chemical separation methods after thermal neutron induced fission of235U. It's decay properties were investigated employing semiconductor spectrometers and coincidence techniques. A half-life of 24.4±0.2 sec was found. Out of 29 gamma rays, 25 transitions representing 97% of the observed gamma-ray intensity were placed in a decay scheme comprising 19 excited states of95Y.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 257 (1972), S. 424-439 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The nucleide93Sr was isolated by chemical separation methods after thermal neutron induced fission of235U, and its decay properties were investigated employing scintillation and semiconductor spectrometers and coincidence techniques. A half-life of 7.43±0.03 min and aQ β-value of 4.3±0.2 MeV were found. Out of 74 gamma-rays, 55 transitions, representing 97% of the observed gamma-ray intensity, could be placed in a decay scheme comprising 22 excited states of93Y.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 259 (1973), S. 67-73 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The nuclide94Sr was isolated by chemical separation methods after thermal neutron induced fission of235U. Its decay properties were investigated employing semi-conductor spectrometers and coincidence techniques. A half-life of 74.1±0.3 sec was found. Besides the 1428.3 keV γ-ray we found 4 new γ-rays which could be placed in a decay scheme comprising three excited states of94Y. The 1+ states in theuu-nuclides90,92,94Y and88,90,92Rb are compared.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Monatshefte für Chemie 102 (1971), S. 1626-1630 
    ISSN: 1434-4475
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The enolic form of cyclic compounds like 4-hydroxycoumarin,-2-pyronones,-2-pyridones and cyclohexane-1,3-diones yields malonyl heterocycles by heating withMeldrum acid. Enolisierbare Ringverbindungen vom Typ des 4-Hydroxycumarins,-2-pyronons und-2-pyridons sowie des 1,3-Cyclohexandions schließen beim Erhitzen mitMeldrumsäure Ringe zu Malonyl-heterocyclen.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Cellular and molecular life sciences 26 (1970), S. 313-314 
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Zusammenfassung Die Leukozyten einer 44jährigen Frau und ihrer 8jährigen Tochter wurden in vitro kultiviert und mit H3-Thymidin markiert. Die Auswertung von je 1000 Mitosen ergab für die Zellen beider Personen eine GenerationsdauerT von 26 h respektive 27 h, und eine Mitosedauer von 1, 5, respektive 2, 2 h.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Mathematische Zeitschrift 140 (1974), S. 67-78 
    ISSN: 1432-1823
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Springer
    Monatshefte für Chemie 102 (1971), S. 1096-1100 
    ISSN: 1434-4475
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Die Thermolyse vonMeldrumsäure mit Acetylacetonimin liefert 4.6-Dimethyl-2-oxo-1.2-dihydro-nicotinsäure, während mit Benzoylacetonimin die 4-Methyl-2-oxo-6-phenyl-2H-pyran-3-carbonsäure entsteht. Aus 1.3-Diketonen werden die entsprechenden Pyronoverbindungen erhalten.
    Notizen: Abstract Thermolysis ofMeldrum acid with acetylacetone-imine yields 4.6-dimethyl-2-oxo-1.2-dihydro-nicotinic acid, with benzoylacetone-imine 4-methyl-2-oxo-6-phenyl-2H-pyran-3-carboxylicacid is obtained. Pyrono derivatives are formed from 1.3-diketones.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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