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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 10 (2000), S. 327-340 
    ISSN: 1434-6079
    Keywords: PACS. 31.15.Ar Ab initio calculations - 31.50.+w Excited states - 32.80.Dz Autoionization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We present a detailed analysis of doubly excited resonances in H- of both and symmetry. Both resonance positions and total widths for auto-detachment are calculated using complex coordinate scaling in a Sturmian-type basis in perimetric coordinates. The resonances are classified by approximate quantum numbers with help of their Lewis structures. For the first time, a new class of shape resonances is reported which can be understood as resulting from couplings between different adiabatic potentials with both binding and repulsive character. In addition, we present an analysis of the so called mass polarisation term which gives rise to specific isotope shifts.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1572-9540
    Keywords: atomic structure ; mass measurements ; Penning trap
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The mass of a highly charged ion is the sum of the mass of the nucleus, the mass of the electrons and the electronic binding energies. High accuracy mass measurements on highly charged ions in a sequence of different charge states yield informations on atomic binding energies, i.e., the ionisation potentials. In our contribution we discuss the possibility of determining atomic binding energies of highly charged ions to better than 20 eV via cyclotron frequency measurements in a Penning trap. At this level of accuracy different contributions to the binding energies, like relativistic corrections, Breit corrections and QED corrections, can be measured.
    Type of Medium: Electronic Resource
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