The p-shell nuclei in a(0+2)h-bar ω model space

In this thesis the phenomenological approach is used to obtain a microscopic description for nuclei with A = 4-16, the p-shell nuclei. Despite the successes of these earlier calculations a number of discrepancies between theory and experiment remained. In particular the existence of intruder states was an unsolved problem. These are low-lying states in the spectrum which could not be reproduced in the calculations. However, one assumed that they could be described in larger model spaces. It is the topic of this thesis, which is a natural continuation of the earlier calculations: the p-shell nuclei in a (0+2) h.barω model space. Chapter 2 defines the (0+2) h.barω model space and describes a translation invariant interaction, which is parametrized by talmi integrals. Chapter 3 discusses the fitting procedure in detail. It is shown how static moments can be included in this procedure. Furthermore two kinds of errors for the parameters are defined. They give an indication about the accuracy of the parameter values. The strategy to obtain the interaction is also described in this chapter. Finally the resulting interaction is presented and followed by a discussion about the values of the parameters. Chapter 4 shows the obtained spectra. They are compared with experimental data. Besides it is explained why the 'mixing catastrophe' does not appear with the present interaction parameters. The interesting phenomenon of radially excitated states is discussed well. In chapter 5 the structure of the obtained wave functions is presented in more detail. In chapter 6 the obtained values for several observables are given. These are the charge r.m.s. radii, static moments, M1- and E2-transition strenghts, log ft values and form factors for electron scattering. All calculated observables are compared with the experimental values. Chapter 7 contains the main conclusions which can be drawn from the present investigation. (author). 77 refs.; 75 figs.; 9 tabs