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  • 1
    Electronic Resource
    Electronic Resource
    Physical model of photostimulated luminescence of x-ray irradiated BaFBr:Eu2+ (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 1405-1412 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A dynamical model of the temporal dependence of photostimulated luminescence of the storage phosphor BaFBr:Eu2+ as a result of preceeding x-ray irradiation is presented. The model is based on a monomolecular recombination mechanism. The commonly used bimolecular mechanism leads to contradictions with experimental observations. The monomolecular recombination is explained by the existence of a photostimulable luminescence complex with a recombination center and an electron trap in close proximity. Charge transfer after optical excitation occurs through tunneling. The simulation of the transient charge carrier dynamics is performed through rate equations. Good agreement wih experimentally determined temporal responses for different x-ray doses applied and stimulating light intensities is obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341838
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    High intensity electron channeling and perspectives for a bright tunable x-ray source (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 2956-2958 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Using the continuous wave electron beam of the new Darmstadt superconducting electron accelerator and high intensity axial channeling in a diamond crystal, the possibility for the production of an intense tunable photon source in the x-ray region is investigated. Due to low emittance of the machine and its high current it has become possible, for the first time, to produce channeling radiation in the energy region of a few keV with an intensity of up to 2×1010 photons/s in an x-ray energy window of 10%. This is six orders of magnitude more than what has been observed previously.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.103738
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Low energy spectrum and giant multipole resonances of12C (I) (1981)
    Springer
    The European physical journal 302 (1981), S. 165-179 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In a consistent shell model approach excitation energies and electromagnetic transitions are calculated for the low energy part of the12C spectrum up to the giant resonance region within a (1p1h+2p2h) configuration space. Comparison with available experimental data shows that almost the complete spectrum up to 40MeV can be described consistently. Thereby it is found that whereas the low lying collective states remain nearly unchanged by the inclusion of (2p2h) configurations, the spreading widths of all (2ℏω) giant resonances are influenced drastically. For serious discrepancies in a few levels (4p4h) configurations or mesonic and baryonic degrees of freedom might be responsible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01413046
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  • 4
    Electronic Resource
    Electronic Resource
    The low energy spectrum of12C (II) influence of virtual isobar admixture (1981)
    Springer
    The European physical journal 302 (1981), S. 247-259 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The influence of virtual isobar configurations on low energy properties of12C is investigated in the framework of an extended particle hole model. We find an appreciable, strongly state dependent influence of virtual isobar admixture on excitation energies and reduced transition probabilities to the ground state, though quantitative predictions depend sensitively on the various model assumptions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415545
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  • 5
    Electronic Resource
    Electronic Resource
    Splitting of the isoscalarE0 andE2 giant multipole resonances in16O (1976)
    Springer
    The European physical journal 276 (1976), S. 99-102 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The recently observed distribution of the transition strength of the isoscalar Giant Quadrupole Resonances can be explained by the admixture of (2p 2h)-excitations to the conventional (1p 1h)-configurations. The calculations agree nicely with (α, α′) and (e, e′) experiments. Due to the same mechanisme the Giant Monopole Strength is expected to be spread between 20 MeV and 40 MeV which makes it probably very difficult to detect such resonances experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437703
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  • 6
    Electronic Resource
    Electronic Resource
    Splitting of the isovector Giant Quadrupole Resonances in12C and16O (1977)
    Springer
    The European physical journal 280 (1977), S. 175-180 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The isovector Giant Quadrupole Resonances (GQR) of12C and16O have been investigated in a (1p1h) and (2p2h) modelspace using bound state wavefunctions. The results indicate a strong splitting of the (1p1h) E2 strength in both nuclei due to the coupling to the (2p2h) configurations. Such an effect has not been found in the case of the Giant Dipole resonance. This qualitatively different behaviour can be understood from the unperturbed particle hole energies of the 1 and E2 Giant Resonances, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01409547
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  • 7
    Electronic Resource
    Electronic Resource
    On the scaling of the paramagnetic susceptibility of atoms, nuclei and nucleons (1985)
    Springer
    The European physical journal 320 (1985), S. 253-257 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The present status of the paramagnetic susceptibility of nuclei derived from measurements of magnetic dipole ground state transitions is reported. The values for nuclei are compared with corresponding values from atomic and nucleonic matter. It is found that the mean paramagnetic susceptibilities of atoms (typical values of metals are chosen for comparison), nuclei and nucleons scale with the corresponding Fermi energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01881272
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Isoscalar quadrupole giant resonance in208Pb: A statistical analysis of high-resolution inelastic electron scattering spectra (1987)
    Springer
    The European physical journal 326 (1987), S. 41-50 
    Details
    ISSN: 1434-601X
    Keywords: 24.60.−k ; 25.30.Fj ; 27.80.+w
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The fine structure observed in high resolution inelastic electron scattering spectra for208Pb in the excitation energy range of the isoscalar giant quadrupole resonance has been analysed with a fluctuation analysis technique. The obtained density of levels as a function of excitation energyE x has then been used as a constraint for the shape and magnitude of the (radiative) background subtracted spectra subjected to a multipole decomposition. The derivedE2 strength in the region 8.0≦E x≦11.5 MeV exhausts (50 −7 +15 % of the energy weighted sum rule. TheE2 strength found is considerably larger than previously estimated from the same spectra and it is now both in shape and magnitude in good agreement with results from a recent208Pb(e, e′n) coincidence experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294569
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