Annual report / Kernforschungsanlage Jülich Institut für Kernphysik.|n1987 |h[E-Book] /|c Editorial Board: F. Grümmer ; K. Kilian ; O. Schult ; H. Seyfarth ; J. Speth ; P. Turek

On July 10, 1987 the official opening ceremony was held for the ISIS project.After several years of design and construction, this project has beencompleted and set into operation. The main component is a two stage ECR-sourcewith a completely superconducting magnetic structure. A beam-guiding,preparation and axial-injection system transports the beam into the medianplane of the cyclotron. Ion beams up to sulphur, in an energy range between22.5 to 45 MeV per nucleon, have been used for experiments.The main task of the IKP is now the realization of the cooler synchrotronCOSY. To make way for this important project, several of our researchactivities have been curtailed or terminated, respectively and some otherswill follow. The construction of COSY is supervised by a project managementwhich coordinates the common efforts of the IKP and the ASI-group with thevarious divisions of the KFA infrastructure. Last December the lattice designof COSY was reviewed by an international committee of experts.Significant experimental results in the past year have included: (i) Theobservation of the decay of the giant electric dipole resonance in hotcompound nuclei up to an excitation energy of 400 MeV in the mass regionA ~ 170. (ii) The coexistence of octupole- and quadrupole-shapes in nucleihas been demonstrated experimentally for the first time. (iii) New andsurprising experimental evidence has been discovered for a strong mass-numberdependence of the structure of neutron-rich nuclei around A ~ 100. (iv) TheOSIRIS-collaboration has discovered a superdeformation in $^{146}$Gd. (v) Theinternational collaboration PS 185 at the LEAR-ring at CERN has investigatedangular distributions and polarization of the A-particle in the reaction$\overline{p}$p + $\overline{\Lambda} \Lambda$ at threshold. A strong suppression of the s-wave was found. Important theoretical results have included: (i) Calculation of quark-meson structure of the nucleon within a projected chiral soliton-theory. (ii)Microscopic analyses of charge-exchange reactions in the GeV-region haverevealed important information about baryon-resonances in nuclei.The focus of our research activities is moving from low-energy nuclearstructure and nuclear reaction physics into the field of medium energyphysics, where COSY will be an experimental facility of great impact andimportance