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Enterprise
(1972)
Aufsatz
Atomic and ionic radii of superheavy elements
(1972)
Atomic and ionic radii are presented for the elements E104-E120 and E156-E172. It is shown that a number of effects correlated with the large relativistic contraction of orbitals with low angular momentum leads to smaller atoms for higher atomic numbers. It is expected that Cs is the largest atom in nature.
Aufsatz
Berufsanforderungen und flexible Altersgrenze
(1972)
In 1973 the government of the Federal Republic plans to introduce a flexible retirement age. According
to this new law, old age pensions can be paid already to people who are 63 years of age instead
of 65 as at present. The government thus hopes to do more justice to the difference in capacity for work
of elderly insured people and to the lact that the decline of life of humans depends to a certain extent
on the occupational requirements demanded of them. Based on social science and medical research
results this ...
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
Calculation of isomer shift in Mössbauer spectroscopy
(1972)
The approximations normally used in the calculation of the isomer shift are compared with the exact expressions using Dirac-Slater orbitals and a three-parameter Fermi-type nuclear charge distribution. The nonuniformity of the electronic density over the nuclear volume affects the results. Different choices of the nuclear surface thickness t and the radius c in the protonic
density P_N (\gamma) also affects the isomer shift differently even though the values are chosen to yield a given value of \delta <r^2>. The ...