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  • 1
    Electronic Resource
    Electronic Resource
    Coulomb and centrifugal barrier bound dianion resonances of NO2 (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 114 (2001), S. 147-151 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: New short-lived resonance states of NO22− have been studied by bombarding NO2− anions by low-energy, mono-energetic electrons at the ASTRID heavy-ion storage ring. Storage for several seconds before the measurement ensures full vibrational relaxation of NO2− target anions. The dianion resonances were identified by the detection of resonances in the cross section for formation of neutral NO2. Two resonances were observed: The one of lowest energy is assigned to be the ground state of NO22− based on an ab initio calculation. This state may be held by a Coulomb barrier alone. A second state of significantly higher energy is argued to be held by a combined Coulomb and centrifugal barrier. Finally, a new scheme in which electron recombination may create stable dianions is proposed. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1328380
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    High Arctic geopotential stress field and implications for geodynamic evolution (2017)
    Geological Society (of London)
    Details
    Publication Date: 2017-04-15
    Description: We use new models of crustal structure and the depth of the lithosphere–asthenosphere boundary to calculate the geopotential energy and its corresponding geopotential stress field for the High Arctic. Palaeostress indicators such as dykes and rifts of known age are used to compare the present day and palaeostress fields. When both stress fields coincide, a minimum age for the configuration of the lithospheric stress field may be defined. We identify three regions in which this is observed. In north Greenland and the eastern Amerasia Basin, the stress field is probably the same as that present during the Late Cretaceous. In western Siberia, the stress field is similar to that in the Triassic. The stress directions on the eastern Russian Arctic Shelf and the Amerasia Basin are similar to that in the Cretaceous. The persistent misfit of the present stress field and Early Cretaceous dyke swarms associated with the High Arctic Large Igneous Province indicates a short-lived transient change in the stress field at the time of dyke emplacement. Most Early Cretaceous rifts in the Amerasia Basin coincide with the stress field, suggesting that dyking and rifting were unrelated. We present new evidence for dykes and a graben structure of Early Cretaceous age on Bennett Island.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society (of London)
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