Shape coexistence and center-of-mass effects in N=Z medium mass nuclei

Results are presented concerning shape coexistence and shape transition at low and intermediate spins in the N = Z nuclei 72 Kr, 76 Sr and 80 Zr obtained within the complex version of the Excited Vampir variational approach. The effects of possible contaminations due to the center-of-mass motion are discussed using a rough method to eliminate them at least approximately. The results indicate maximum influence on the observables depending on band mixing. Detailed illustration of the effects on the oblate–prolate mixing and the electromagnetic properties, as well as the alignments and particle occupations of the 0 g 9/2 spherical orbital is presented for the 72 Kr nucleus.