SHAPE COEXISTENCE IN THE Ru ISOTOPES; MULTI-SPECTROSCOPIC STUDY OF 98Ru AND BEYOND-MEAN-FIELD CALCULATIONS.

The level structure of 98Ru was investigated via -ray spectroscopy following the β+/electron capture decay of 98Rh and with the 100Ru(p; t)98Ru reaction. Additional -ray transitions from low-lying levels were observed and spin-parity assignments of some key states were clarified, permitting the assignment of the 0+2 band and the band. The energies of the states in these bands fit well into the systematic trends observed in the heavier isotopes. The results are interpreted with the aid of beyond-mean-field calculations performed within the self-consistent configuration mixing method. [ABSTRACT FROM AUTHOR]