Search for isovector giant monopole resonances.

The focus of this work is on the isovector giant monopole resonances. For these, few expiremental results are available. In the hydrodynamical model they can be described as breathing-mode oscillations. The best known breathing mode is isocalar in nature (the above-metnioned isoscalar giant monopole resonance) and wich, because of its simple sturcture, is an excellent tool to study nuclear compressibilities.