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  • 1
    Monograph available for loan
    Monograph available for loan
    Oxford [u.a.] : Oxford Univ. Pr.
    Call number: M 98.0154
    Type of Medium: Monograph available for loan
    Pages: xvii, 545 S.
    Edition: 3rd ed.
    ISBN: 0198559488
    Classification:
    C.3.3.
    Language: English
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    Oxford : Oxford Univ. Press
    Call number: AWI A15-02-0026
    Type of Medium: Monograph available for loan
    Pages: XVII, 545 S.
    Edition: 3. ed., reprinted (with corr.)
    ISBN: 019855947X
    Branch Library: AWI Library
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  • 3
    Publication Date: 2020-02-12
    Description: Diabase exposed amongst outcrops of the Little Dal Basalts (LDB) between the Coates Lake Group and overlying the Little Dal Group in the Mackenzie Mountains of northern Canada has a geochemical signature that is characteristic of the LDB and associated Tsezotene sills. Marginally concordant magmatic zircons from a sample of the diabase yielded CA-ID-TIMS weighted mean 207Pb/206Pb and 206Pb/238U dates of 778.4 ± 1.8 Ma (2σ) and 775.10 ± 0.54 Ma (2σ), respectively. These dates provide the first direct constraint on the age of the LDB and confirm a temporal relationship to the widespread Gunbarrel magmatic event that affected western North America during the protracted breakup of the supercontinent Rodinia. Hafnium isotopes were measured on three grains and calculated values of εHf at 775 Ma are 9.5 ± 0.4, 9.7 ± 0.2 and 9.3 ± 0.2 (2σ), consistent with a mantle plume genesis. Gunbarrel magmatism was not temporally related to the final fragmentation of Rodinia and the establishment of the west Laurentian continental margin (rift-drift transition), which did not occur until after 720 Ma. However, the age and stratigraphic position of the LDB suggest the Gunbarrel event may have thermally weakened the lithosphere leading to a period of intracontinental rifting and the deposition of the Coates Lake Group rift-sediments prior to 732 Ma. The sample of diabase also yielded a single 207Pb/206Pb 1565.7 ± 1.5 Ma xenocrystic zircon with a model Th/U ratio of 0.47 indicative of a crustal origin. Although there is limited evidence for felsic magmatism, metamorphism, and orogenesis of this age in western Laurentia, a range of felsic volcanic rocks and/or intrusive suites of this age do occur in southern, central and eastern Australia, supporting existing reconstructions of the Nuna/Columbia supercontinent that place the northwest margin of Laurentia adjacent to Australia.
    Type: info:eu-repo/semantics/article
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 82 (1978), S. 885-888 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 82 (1978), S. 889-894 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 2370-2374 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Experimental data on the positions and widths of the vibrational energy levels of the C 3Πg Rydberg state of molecular oxygen are interpreted. The energy levels are described as resonances in the elastic scattering of oxygen atoms in the open 1 3Πg valence state caused by a coupling to the closed C 3Πg Rydberg state. The coupled scattering equations are set up with an empirical valence potential energy curve and Rydberg-valence interaction potential and it is shown that the energy level positions and widths can be reproduced by an interaction of 63 meV and a potential energy curve that crosses the Rydberg curve on the attractive part of its outer limb.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 7606-7607 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The rotational constants of the lowest vibrational levels of the d 1Πg state of O2 display an anomalous behavior which has been attributed to interactions between the Rydberg and valence 1Πg states. We confirm the suggestion by carrying out a theoretical analysis in which we solved numerically the pair of coupled equations that describe the interacting states.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 94 (1991), S. 1705-1711 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The two-photon d 1Πg(v')← ←X 3Σ−g(v‘) transition in O2 is studied using resonance enhanced multiphoton ionization (REMPI) spectroscopy and the lowest four vibrational levels of the d 1Πg Rydberg state are characterized. Anomalies in the rotational constants of the Rydberg vibrational levels and perturbations in the REMPI spectra are attributed to the interaction of the Rydberg state with a bound diabatic 1Πg valence state. The rotational dependence of the Rydberg–valence interaction is explored by solving the coupled eigenvalue equations describing the interaction of the two states. The results from solution of the coupled equations as well as observations from photoelectron spectroscopy experiments are used to understand the additional structure seen in the REMPI spectra in the vicinity of the v'=2 Rydberg vibrational level.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 2375-2383 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A theoretical formulation is presented of the predissociation of vibrational levels of the C 3Πg Rydberg state of O2 in terms of an inhomogeneous driven equation which takes account of couplings between the Rydberg state and the lowest two 3Πg valence states and the coupling between the valence states. The branching ratios for decay to the end products O(3P)+O(1D) and O(3P)+O(3P) are obtained and it is found that by a suitable choice of potential energy curves and coupling interactions agreement can be obtained with the experimental data. Utility of the Landau–Zener model is investigated and it is shown to be highly successful in describing the decay paths of the low-lying vibrational levels but it fails for the high-lying levels because of the occurrence of quantal interference between the channels. It is demonstrated that because of flux conservation the total width of the Rydberg vibrational state is independent of the coupling between the valence states.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 983-986 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Undoped, phosphorus-, and boron-doped microcrystalline silicon films were prepared by rf reactive sputtering, and their properties were investigated through structural, optical, and transport measurements. The merits of microcrystalline films for the p and n contacts in photovoltaic devices were demonstrated through the fabrication of single and tandem p-i-n solar-cell structures with best efficiencies between 5 and 6%.
    Type of Medium: Electronic Resource
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