Dynamical correlations in asymmetric infinite nuclear matter are investigates in a transport theoretical approach. Self-energies due to short range correlations and their influence on the nucleon spectral functions are described in an approach accounting for a realistic treatment of mean-field dynamics and a self-consistently derived quasi-particle interaction. Landau-Migdal theory is used to derived the short range interaction from a phenomenological Skyrme energy density functional. The spectral functions in asymmetric nuclear matter are found to follow in their gross features closely the patterns observed previously in symmetric nuclear matter. An interesting sensitivity of dynamical self-energies and spectral functions on the momentum structure of the underlying interactions is found.

The resonance in the 12C + t2C system at E .... = 19.3 MeV has been studied in the neutron and proton decay channels. From (p, 7), (n, p) and (n, 7) coincidence measurements high spin states could be localized in A--23 nuclei, in 23Mg up to possibly 21/2 +. These states were resonantly populated. The present data favor J~= 17/2 + for the 9.61 MeV state in 23Mg and therefore also for the probable parent state at 9.81 MeV in 23Na. A J~=12 + assignment to the resonance is supported and evidence was found that the resonant excitation of the lowest 15/2 + and 17/2 + states in mass 23 nuclei is caused by a change of the intrinsic structure of the Yrast levels around J~= 15/2 + towards larger deformation.

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We investigate short range correlations in nuclear and hypernuclear matter. Self-energies due to short range correlations and their influence on the nucleon and Λ-hyperon spectral functions are described in an approach accounting for a realistic treatment of mean-field dynamics and a self-consistently derived quasi-particle interaction. LandauMigdal theory is used to derived the short range interaction from a phenomenological Skyrme energy density functional, subtracting the long range pionic contributions to the nucleonic spectral functions. We discuss our results for different hyperon-baryon ratios to show the influence of strangeness on the correlations in hypernuclear matter.

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