Perspectives for studies of extremely deformed nuclei near ⁴⁰Ca

The medium light nuclei situated in the nuclear chart between the double magic nuclei ⁴⁰Ca and ⁵⁸Ni exhibit many features characteristic for well deformed heavier nuclei. Although in this regions close to the stability line the ground states are predominantly spherical or oblate, at higher values of spin well developed rotational bands are present. This happens in particular when the intruder f_7/2 or g_9/2 proton- and neutron- shells are partially filled. Such SD-like bands, resulted from the multiple particle-hole excitations across the magic N,Z=20 shells, were observed so far in several isotopes of Ar, Ca and Ti, but this knowledge is limited to rather moderate spins I ≤ 16. The effective interactions derived for the sdfp active orbitals allowed for reasonable description of the collectivity developed in these nuclei, up to the maximum aligned spin, within the spherical shell model. On the other hand, recent calculations performed in the framework of the EDF theory foresee extremely deformed, high spin cluster states, that become yrast beyond the SD termination. I will discuss plans to investigate the high spin states in these nuclei. The experiments will take advantage of the new detector systems as AGATA and PARIS at GANIL, or GALILEO and RFD at LNL. This document is composed of an abstract and the slides of the presentation. (author)