Elastic and inelastic scattering of neutrons from Fe and Cu : (I). Measurements from 8 to 14 MeV and a spherical optical model analysis

Differential cross sections were measured at 8, 10, 12 and 14 MeV for elastic scattering of neutrons from enriched samples of ⁵⁴Fe, ⁵⁶Fe, ⁶³Cu and ⁶⁵Cu. Inelastic scattering to the first excited state in ^{54, 56}Fe was also observed. For the ^{63, 65}Cu isotopes, the inelastic cross sections for scattering to the combined group of the three (five) states were determined at 8 and 10 MeV (12 and 14 MeV). The elastic scattering data are compared to predictions of earlier global optical models. New spherical optical model representations were obtained. These data were combined with data for nickel, tin and lead to generate a new global parametrization. Comparisons of derived volume integrals for the potentials, total cross sections and potential radii are made to available information.     

Über diskontinuierliche Gruppen in lokal-kompakten Räumen

Ohne ZusammenfassungDie vorliegende Arbeit ist im wesentlichen identisch mit §. 1 meiner von der Naturwissenschaftlichen Fakultät der Universität Münster angenommenen Habilitationsschrif Automorphe Funktionen und Spektraltheorie.     

Erzeugung und Ausheilung von Gitterstörungen und ihr Einfluß auf die Supraleitung von Indium und Thallium

The Variation of the transition temperature with residual resistance of coldworked In and Tl shows a similar behaviour as in dilute alloy experiments. Subsequent annealing removes lattice defects in distinct steps and restores the properties of pure samples at temperatures below 250 °K. Some of the results can be interpreted in accordance with the model developed byMarkowitz andKadanoff on alloy experiments. Values for the anisotropy parameter 〈a ²〉_In=0.02 and 〈a ²〉_Tl=0.04 were obtained. The interpretation of the “valence” effect and the influence of stress is discussed.     

Über den Einfluß der Coulombwechselwirkung bei der Inneren Feldemission

Zeitschrift für Physik A Hadrons and nuclei - Es wird die Dämpfung der Valenzbandzustände der Kristallelektronen im äußeren elektrischen Feld untersucht. In...     

Fortsetzung von kohärenten analytischen Modulgarben

Ohne Zusammenfassung     

Force-field andab initio calculations of five-membered rings: II. Force constants and ab initio gradient calculations of the geometries of dioxoles and dithioles

Ab initio gradient calculations of the geometries of 1,3-dioxol-2-one, -thione, -onium, and the analogous 1,3-dithioles are reported. Together with force constants derived from GVFF calculations, these results give evidence of the changes in structure when substituting oxygen by sulfur. The electronic structure as well as the vibrational behavior are mainly determined by the electronic delocalization of the heteroatoms.