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Aufsatz
X-Ray spectra of superheavy and quasi-superheavy elements
(1973)
We discuss the possibility of identifying superheavy elements from the observation
of their M-shell x-ray spectra, which might occur during the collision of a superheavy element with a heavy target. The same question is discussed for the possible observation of the x-rays from the quasimolecule (quasi-superheavy element) which is formed during such a heavy-ion collision. It is shown that it is very difficult, if not impossible, to determine any information about the interesting quantum electrodynamical effects from ...
Aufsatz
Two-muonic atoms
(1974)
X-ray transition energies for two-muonic atoms are calculated. The basis are relativistic self-consistent-field calculations including the corrections normally known in muonic atoms plus the vacuum polarization, magnetic interaction and retardation in the \mu-\mu-interaction, the specific mass correction and the configuration interaction.
Aufsatz
Model calculations on the influence of quantum electrodynamical effects on the chemistry of superheavy elements.
(1972)
Using a phenomenological model, the influence of quantum electrodynamical effects on the prediction of the chemical behavior of superheavy elements within a relativistic Dirac-Slater calculation was investigated. This influence will be small and nondetectable for elements up to Z = 114. For elements near Z = 164 some changes in the ground state configurations occur but the chemical behavior will not change. Using this heuristic model, it is also possible to calculate elements beyond Z = 175. As an example we have ...
Aufsatz
Effect of nuclear motion on the energy eigenvalues in muonic atoms
(1973)
I have investigated the effect of the nuclear motion on the energy eigenvalues in muonic
atoms. In addition to the usually used reduced-mass correction, I have calculated the relativistic influences including the magnetic and retardation interaction between the nucleus and the muon for the inner orbitals of muonic atoms.
Aufsatz
Electronic configuration in the ground state of atomic lawrencium
(1974)
Self-consistent relativistic Dirac-Hartree-Fock calculations have been made of some lowlying electronic energies for the atoms of all elements in ground-state ds^2 electron configurations.
The results indicate that, contrary to some previous estimates, the ground electronic
state of atomic Lr could be in either the 5f^14 6d7s^2 or the 5f^14 7p 7s^2 electron configuration.
The separation between the lowest energy level of the 5f^14 6d7s^2 configuration and the lowest energy level of the 5f^14 7p7s^2 configuration ...
Aufsatz
Beam-foil-excited auger transitions in neon
(1975)
Energy spectra of electrons ejected from collisions between a carbon foil and Ne
projectiles with energies between 1.4 and 20 MeV have been measured. Continuous and
discrete electron energy distributions are observed. Auger transitions of foil-excited Ne have been studied. Using relativistic Dirac-Fock multiconfiguration calculations, most of the measured Auger transitions have been identified.
Aufsatz
Electronic structure of UF_5
(1979)
Non-relativistic and relativistic self-consistent Hartree- Fock-Slater and Dirac-Slater models have been used to calculate one-electron energy levels and ionization energies for UF_5. The calculations were performed in an assumed structure of C_4v symmetry with the uranium atom at the center of mass of the molecule. The spacing and level ordering are compared
with earlier results obtained with the MS X\alpha method using the muffin-tin approximation. Connections with the multiphoton isotope separation scheme of UF_6 ...
Aufsatz
The problem of noncharacteristic quasimolecular X-rays in heavy ion collision
(1976)
Quasi-molecular X-rays observed in heavy ion collisions are interpreted within a relativistic calculation of correlation diagrams using the Dirac-Slater model. A semiquantitative description of noncharacteristic M X rays is given for the system Au-I.