3-QUASI-PARTICLE EXCITATIONS IN BR-77

Excited states in Br-77 were investigated via the reactions As-75(alph a,2n)Br-77 and Ge-73, Ge-74, (Li-7,xn)Br-77 at beam energies of 27 and 35 MeV, respectively. On the basis of coincidence and angular distrib ution data of the gamma rays the known level sequences of positive and negative parity were extended to tentative spins of 25/2HBAR, and a n ew decay sequence beginning at spin and parity of (17/2-) was found. T his new sequence is discussed in terms of the 3-quasiparticle configur ation (pig9/2 x nug9/2 x nu(p1/2, P3/2, f5/2)). Moreover, the irregula rity found in the moments of inertia at HomegaBAR almost-equal-to 0.4 MeV for the negative-parity band is attributed to a g9/2 quasiproton a lignment.