Uran-Anreicherung mit Lasern

In uranium enrichment a substantial cost reduction seems to be possible with laser-based processes. Two different approaches are under investigation, the atomic-vapor process and the molecular process with UF₆. The specific problems are discussed and the laser parameters are estimated. After intensive development activities in the past ten years the laser processes seem now to be ready for technical realization.     

Elementarteilchen mit Charm

Following an article on the charm model (Naturwissenschaften 64, 229 (1977)) and its predictions, the present paper reviews the current status of its experimental verification. Four out of six predicted mesons with charm have been detected by their nonleptonic decay. The semileptonic decay of charmed mesons has also been established proving the predicted weak nature of the decay. In addition, there are strong indications as to the existence of charmed baryons from a photoproduction experiment corroborating clues given earlier by neutrino experiments.     

Elementarteilchen mit Charm

Several theoretical models have been proposed to explain the new heavy mesons discovered in 1974, among them the charm model and the color model. Recent experiments strongly support the charm model. Following the historical development from isospin-symmetry SU(2) over isospin-strangeness-symmetry SU(3) to isospin-strangeness-charm-symmetry SU(4), the present article discusses the basic assumptions of the model and its predictions concerning the production and decay of charmed particles. In a second article the current status of the model's experimental verification is reviewed.     

Kernstrakturuntersuchungen mit langsamen Neutronen

Die hier besprochenen Arbeiten wurden dank intensiver Förderung durch viele Menschen und Institutionen durchführbar. Mein besonderer Dank gilt den Professoren H. Maier-Leibnitz, N. Bohr, B. Mottelson und A. Bohr sowie den Mitarbeitern der dänischen Atomenergiekommission, des Instituts Laue Langevin und des Bundesforschungsministeriums. Die Arbeiten wurden durch Kollaborationen mit Wissenschaftlern aus den USA, Belgien und Schweden sehr erleichtert, schon zu einer Zeit, wo Kollaborationen dieser Art völlig unüblich waren. Es ist mir darum ein besonderes Anliegen, meinen Kollegen, besonders Prof. R. Sheline, Prof. T. v. Egidy, Dr. H. Motz, Dr. H. R. Koch, Dr. B. P. Maier, Dr. H. G. Börner, Dr. H. Seyfarth und allen meinen Mitarbeitern von Herzen zu danken.