CONTRIBUTIONS TO CYSTOPLASTIC OPERATIONS

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Coulomb Excitation of 68,70Cu: First Use of Postaccelerated Isomeric Beams

We report on the first low-energy Coulomb excitation measurements with radioactive Iπ=6- beams of odd-odd nuclei 68,70Cu. The beams were produced at ISOLDE, CERN and were post-accelerated by REX-ISOLDE to 2.83  MeV/nucleon. γ rays were detected with the MINIBALL spectrometer. The 6- beam was used to study the multiplet of states (3-, 4-, 5-, 6-) arising from the π2p3/2ν1g9/2 configuration. The 4- state of the multiplet was populated via Coulomb excitation and the B(E2;6-→4-) value was determined in both nuclei. The results obtained illustrate the fragile stability of the Z=28 shell and N=40 subshell closures. A comparison with large-scale shell-model calculations using the 56Ni core shows the importance of the proton excitations across the Z=28 shell gap to the understanding of the nuclear structure in the neutron-rich nuclei with N≈40

Global Existence of Classical Solutions for A Class Nonlinear Parabolic Equations

In this article we prove the existence of classical solutions for a class nonlinear parabolic equations. We propose new integral representation of the classical solutions. As an application we give continuous dependence and differentiability of the solutions with respect to the initial data and parameters