E2-TRANSITION AND Q(J+) SYSTEMATICS OF EVEN MASS XENON NUCLEI

The yrast spectra with J(max)(pi) = 10(+),B(E2) transition probabiliti es and Q(J+) values are calculated for even even xenon isotopes by car rying out variation-after-projection calculations in conjunction with a Hartree-Fock-Bogoliubov (HFB) ansatz employing a pairing-plus-quadru pole-quadrupole effective interaction operating in a reasonably large valence space outside the Sn-100 core. Our calculations reveal that th e systematics of low-lying yrast states in these isotopes are intricat ely linked with the manner in which neutrons tend to occupy the variou s valence orbits. The results on B(E2) transition probabilities predic t a dip in the isotopes Xe-114,Xe-116,Xe-120,Xe-124,Xe-128, which migh t be construed to imply different structures for Xe-114,Xe-116,Xe-120, Xe-124,Xe-128 as compared to their neighbors. Besides this, our result s also reveal that both the HFB technique and the quadrupole-quadrupol e-plus-pairing model of the two-body interaction are fairly reliable i n this mass region.