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  • 1
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 83 (1979), S. 1237-1241 
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The decay of201Tl to201Hg has been investigated withγ- and conversion electron spectroscopic methods. The 26 keV level in201Hg, proposed earlier from nuclear reaction studies, was established in this decay. The half-life of this level was determined asT 1/2=630(50) ps by delayedγ-e −-coincidences. TheI π =1/2- assignment for the 1.6 and 167 keV levels was confirmed from angular correlation measurements. A Coulomb excitation experiment on201Hg was performed andB(E2) values were derived.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract High spin states in189Hg have been studied using the181Ta(14N, 6n) reaction. The various one- and three-quasiparticle rotational bands were interpreted within the cranked shell model. The band-crossing frequencies are found to depend on the number of spectator particles. The effect can be accounted for by a residual two-body interaction of appr. −0.11 MeV.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 317 (1984), S. 313-324 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Gamma-ray and conversion electron spectra were measured in the reaction of 25 MeV deuterons on174Yb,196,198Pt,202,204Hg, and232Th. The (d,pxn) deuteron break-up reactions were studied by the measurement ofpγ- andγγ-coincidences. Levels with spins up to approximately 10ħ are observed in the (d,pn) reactions, with a strong preference of the population of yrast states. In the Pt and Hg nuclei the ground bands are seen up to the 6+ states and in196,198pt the semi-decoupled 5−, 7−, and 9− yrast levels are populated most strongly. In202,204Hg we observe fairly strongly new levels with tentative assignments of 5− and 7−. In addition a number of previously unknown levels are identified in the Pt and Hg nuclei, for which no spin-parity assignments could be obtained. A discussion of the level structure in terms of the interacting boson model (196,198Pt) and the shell model (202,204Hg) is given.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 314 (1983), S. 83-88 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The ground state rotational bands in233U and239Pu were investigated in (α, 3n) reactions. Conversion electrons were measured with an iron free orange spectrometer in order to suppress the background from fission. Levels up toI π=33/2+ of theK=5/2 band in233U andI π=31/2+ of theK=1/2 band in239Pu were identified ine −γ coincidence measurements. The level energies of both rotational bands can be well described up to the highest observed spins by a two-parameter angular velocity expansion. The electromagnetic properties of theK=1/2 band in239Pu are discussed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 314 (1983), S. 89-95 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract High spin states in203, 205Bi, populated in the203, 205Tl (α,4n) reactions, have been studied using gamma-ray and conversion-electron spectroscopy. Several previously unobserved isomeric transitions were identified by electron-electron coincidence measurements in both isotopes and in205Bi a new isomer was found. The observed states can be explained as arising from couplings of the oddh 9/2 proton to neutron states in the neighbouring Pb cores. Reduced transition probabilities are derived and discussed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 2 (1971), S. 259-261 
    ISSN: 0933-5137
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Maschinenbau
    Beschreibung / Inhaltsverzeichnis: Production of Dispersion-Hardened Nickel and Cobalt Alloys by means of Powder Metallurgy. Dispersion-hardened nickel and cobalt alloys whose creep-rupture strength drops more slowly at rising temperatures than in the known precipitation-hardened alloys, are suitable for use at 1000-1200 °C. The preferred component for producing dispersed phase is thoria. A cobalt alloy similar to S 816 containing 3% thoria was produced by a chemical process: By precipitation from an aqueous solution of the metallic salts concerned in the presence of a colloidal solution of thoria (partycle size 30-50 Å), one obtains a mixture of the hydroxides or the basic carbonates respectively. Co-precipitation in one single preparation is possible, if certain conditions are observed. After drying and powdering, the precipitate is reduced in a hydrogen stream in two stages (at 700 and at 1230 °C). The resultant metal powder is compacted, vacuum-sintered at 1290 °C and then extruded at 1150 °C.
    Notizen: Dispersionsgehärtete Nickel- und Kobaltlegierungen, deren Zeitstandfestigkeit mit steigender Temperatur langsamer abfällt als die der bekannten ausscheidungsgehärteten Legierungen, sind für den Einsatz bei 1000 bis 1200 °C geeignet. Als härtender Dispersionsstoff wird Thoriumoxid bevorzugt Die Herstellung einer S 816 ähnlichen Kobaltlegierung mit 3% Thoriumoxid erfolgt nach einem chemischen Verfahren: Durch Ausfällung aus einer wässerigen Lösung der entsprechenden Metallsalze in Gegenwart einer kolloidalen Lösung von Thoriumoxid (Teilchengröße 30 his 50 Å) erhält man eine Mischung der Oxidhydrate bzw. basischen Carbonate. Bei Einhaltung bestimmter Bedingungen ist die gemeinsame Ausfällung in einem Ansatz möglich. Nach Trocknen und Mahlen wird das Fällungsprodukt im strömenden Wasserstoff in zwei Stufen (bei 700 und bei 1230 °C) reduziert. Das so erhaltene Metallpulver wird gepreßt, unter Vakuum bei 1290 °C gesintert und bei 1150 °C stranggepreßt.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 320 (1985), S. 295-299 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Multiple Coulomb excitation measurements on202, 204Hg have been performed with 5 MeV/u208Pb projectiles. The ground bands are excited up to the newly discovered 6+ states and B(E2) values are derived for the 4+→2+ and 6+→4+ transitions. Whereas the 2+ and 4+ levels in the Hg isotopes with 196≦A≦204 have an almost constant energy, the 6+ levels increase in202Hg and204Hg, compared to the lighter isotopes, by approximately 100 and 300 keV, respectively. The relative B(E2) values in both nuclei show that the collectivity in the neutron rich Hg nuclei is of more complex origin than expected from the few proton and neutron holes with respect to the 82 and 126 major shells.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    ISSN: 1434-601X
    Schlagwort(e): 25.45 ; 27.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Low lying levels in203Hg and205Hg were studied with the (d, p) deuteron break-up reaction atE d=14 and 18 MeV. Gamma-rays and conversion-electrons were measured in coincidence with protons. In addition delayed spectra were recorded with us and ms beam pulsing. Thei 13/2 neutron hole state was identified in205Hg and confirmed in203Hg. The known level structure of205Hg below 2 MeV is confirmed and extended. For203Hg we observe theγ-decay of several levels below 1.5 MeV, which were previously known from transfer reactions.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 335 (1965), S. 156-166 
    ISSN: 0044-2313
    Schlagwort(e): Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: β-Methylmercapto-ethyl amine (MÄA) behaves as a chelate ligand in 1,1, 1,2 and 1,3 complexes of Cu(II) and Ni(II). In 1,4 complexes of Cu(II), however, two of the MÄA ligands are only bound to the cation by the amino group, and the same is true for both MÄA molecules in [Co(MÄA)2Cl2] and [Zn(MÄA)2Cl2]. β-Ethoxy-ethylamine (ÄÄA)reacts with Cu(II)and Ni(II) salts forming 1,2 and 1,4 complexes in which the ether group probably has no ligand properties. The blue [Co(ÄÄA)2Cl2] having a tetrahedral configuration takes up two addtional ÄÄA molecules into its lattice at room temperature.
    Notizen: β-Methylmercapto-äthylmin (MÄA) fungiert in 1,1-, 1,2- und 1,3-Komplexen mit Kupfer(II)- bzw. Nickel(II)-Ionen als Chelatligand. Dagegen sind in den 1,4-Komplexen, die bei der Umsetzung mit Kupfer(II)-Salzen erhalten werden konnten, 2 der MÄA-Liganden nur über den Aminstickstoff an das Zentralatom gebunden. Auch in den Verbindungen [Co(MÄA)2Cl2] und [Zn(MÄA)2Cl2] besetzt MÄA nur eine Koordinationsstelle. β-Äthoxy-äthylamin (ÄÄA) bildet mit Kupfer(II)-und Nickel(II)-Salzen 1,2- und 1,4-Komplexe, in denen die Äthergruppe sehr wahrscheinlich keine Haftgruppenfunktion besetzt. Der blaue Komplex [Co(ÄÄA)2Cl2], der eine tetraedrische Struktur aufweist, lagert bei normaler Temperatur 2 Mol ÄÄA in das Kristallgitter ein.
    Zusätzliches Material: 2 Tab.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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