K. Wildermuth

About the antisymmetrization of many nucleon systems

Abstract A new method for antisymmetrizing many nucleon systems and its application to the elastic α-16O-scattering is discussed.

Distortion effects in the elastic α-d-scattering

Abstract Variational calculations using trial functions which make explicit allowance for deuteron distortion are carried out for the s-wave of the elastic α -d-scattering.

The ground-state α-decay of 212Po

Abstract The lifetime of the 212 Po α-decay is calculated in the framework of a variational calculation by treating the decaying state as a bound state. Thereby it is very important that the surface region is treated correctly. In this way the right order of magnitude of the lifetime is obtained.

Investigations on exchange terms in heavy ion scattering

Abstract Completely antisymmetrized calculations of heavy ion processes in a microscopic nuclear theory are inaccessible with present-days computing techniques. At subcoulomb energies drastic reductions are possible by a systematic selection of contributing exchange integrals. The 6 Li-α scattering serves as a test for these simplifications.

Cluster structures in double-humped fission barriers☆

Abstract A method is proposed to calculate the shell energy in fission using cluster representations. First results show that the ground state and the second minimum are due to the formation of doubly-magic clusters, while the barriers are due to their breakup.

Cluster aspects of nuclear fission

Experimental fission data for nuclei in the mass regionA = 210 toA =258 are discussed from a unified point of view using cluster representations of nuclei. It is shown that these data can be described as resulting from a superposition of two different modes, one determined by energetically favoured cluster correlations, the other due to liquid-drop effects only. For all nuclei lighter than Fermium the above distinction coincides with that of symmetric and asymmetric fission. Contrary to that in Fermium-isotopes, both symmetric and asymmetric fission are associated with energetically favoured cluster correlations at the Fermi surface.

Examples of a unified nuclear reaction theory

Abstract As examples for a new treatment of nuclear reactions in the frame of a unified theory of the nuclei the elastic α -n and α - α -scattering is calculated, in which one splits the wavefunction of the nucleus in an internal and external part. The results are compared with the corresponding resonating group calculations.

A microscopic treatment of heavy ion scattering at subcoulomb energies

Abstract Based on a microscopic nuclear theory which basically accounts for the Pauli principle, a simple equation for the elastic scattering of heavy ions with identical cores at subcoulomb energies is derived and is applied to the elastic scattering of α on 6Li nuclei.

Isobaric spin mixing in the 8Be 16.62 and 16.92 MeV states

Abstract The 16.62 and 16.92 MeV levels of 8 Be are considered, and it is found from theoretical calculations that it is impossible to make a pure isospin assignment to either of these levels. This is in agreement with various experimental data.

On the importance of the neutron number N=132 for asymmetric fission in the radium region☆

Abstract An analysis of the shell energy in terms of cluster contributions shows that the compound neutron number N=132 together with the (Z = 50)-substructure determines the border between symmetric and asymmetric fission in the Radium region. Possible experimental tests of this hypothesis are discussed.