Einige Bemerkungen zur Frage der eindeutigen Lösbarkeit des Dirichletproblems für ein gewisses System nichtlinearer Differentialgleichungen

Ohne Zusammenfassung     

The decay of76Kr

The decay properties of⁷⁶Kr have been investigated using mass separated samples produced by the ISOLDE facility. New information on energies, spins, parities and transition probabilities concerning levels in⁷⁶Br is presented. No direct β-feeding of the⁷⁶Br ground state was found resulting in a spin-parity assignment of 1^? to this state.     

Conversion coefficient for internal pair creation

The conversion coefficient for internal electron-positron pair formation is calculated for arbitrary electric and magnetic multipolarity. Analytical expressions for the differential conversion coefficientdβ/dE _p can be derived in the range 0≦Z≦118, if one employs relativistic Coulomb wave functions according to pointlike nuclei for the electron. Especially forML-transitions in the high-Z-region we found large deviations from results obtained within the Born approximation.