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  • 1
    Electronic Resource
    Electronic Resource
    On the modification of the Stark states of hydrogen by a weak ac electric field (1990)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 31 (1990), S. 2165-2169 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: A derivation is presented for the compact integral representation that describes the first-order perturbed wavefunction of an electron in a fixed Coulomb field and in a harmonic uniform electric field, for the case of an initial stationary Stark state with the symmetry axis along the electric field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.528619
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Rayleigh scattering fromn=3 states of hydrogenlike atoms (1985)
    Springer
    The European physical journal 321 (1985), S. 187-200 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An exact analytic evaluation of the Kramers-Heisenberg matrix elements for Rayleigh scattering fromn=3 states of hydrogenlike atoms is performed in the nonrelativistic dipole approximation, using the Green's function method. The results are given separately for each subshell. The possibility of 3s↔3d transitions is also considered. The dependence on the photon energy is contained in six invariant amplitudes. The formulas needed for the evaluation of the various cross sections are presented. The numerical results are contained in tables from which partial and total cross sections can be easily built, covering the energy range from zero up to 20 times theK threshold energy. In the vicinity of Balmerα frequency the cross section is large and comparable with that for excitedn=2 states, confirming an earlier hypothesis of Röhr. At other energies the cross sections forn=2 andn=3 states are comparable, too. The results should be useful in plasma diagnostics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01493437
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Analytic inner shell internal conversion coefficients for screened Coulomb potentials (1981)
    Springer
    The European physical journal 301 (1981), S. 109-118 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An analytic method is presented for evalution of internal conversion coefficients (ICC) in inner shells of neutral or ionized atoms. Analytic formulas for ICC are given which include electron screening and static nuclear size effects. Predictions have also been obtained from these formulas for point Coulomb ICC or for screening effects included only in bound state normalization. Very good agreement with full numerical calculations is found, except in those cases where the formation region of the ICC is not well inside the atom. While the discussion in this paper concerns mediumZ elements (30〈Z〈80) and not too low energy, the method can be extended to other situations. The method is suited also for ICC of the inner shells of ionized atoms, even for very high degree of ionization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01419239
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  • 4
    Electronic Resource
    Electronic Resource
    State dependence of rayleigh scattering from an=2 state of hydrogenlike atoms (1986)
    Springer
    The European physical journal 2 (1986), S. 49-59 
    Details
    ISSN: 1434-6079
    Keywords: 32.80.−t ; 34.80.Dp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We consider Rayleigh scattering from a hydrogenlike atom in an arbitrary excitedn=2 state, and we investigate theoretically the dependence of the scattered radiation intensity and Stokes parameters on the state multipoles for the case of unpolarized incident radiation. Because in then=2 case Rayleigh scattering can not be accompanied by the change of the electron angular momentum, only 10 out of the 16 state multipoles influence the scattered radiation attributes. Our study reveals the existence of a measurable quantity which is determined only by Rayleigh scattering from 2p states. For the particular case of excitation by electron impact, some quantitative predictions are made, at the photon scattering angle ϑ=π/2, based on values for the state multipoles extracted from the literature (Blum and Kleinpoppen, Band). The vicinity of Balmer α and Lyman α resonances are studied in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437242
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    Paper (German National Licenses)
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