84 ~kci ted states in the doubly-odd nucleus Rb have mainly been studied via the (~,n) reaction by means of in-beam y-ray spec_ trosoopy. Two new isomers ~e been found, a 5 level at 467. 1 keV and a 5' " level at 544.2 keV with half-lives of 9(2) nss(+) and 11(1) ns, respectively. On top of the isomer a level sequence with increasing spins up to I0 h and probably positive parity has been identified. These states are ascribed to the configuration("g9/2 | ~"g9/2 )" 84 For the doubly-odd nucleus 37Rb47 having one proton hole and three neutron holes in the respective closed (sub)shells at Z=38 and N=50 positive parity levels are e~ted where both the unpaired proton and the unpaired neutron move in the intruder g9/2 orbits. So far, in 84Rb only the y-decay of a long-lived 6-isomer at 463.7 keV to the 2-ground state and to a 3-level at 248.1 keV is well-studied [1,2]. Furthermore, some low-and medium-spin states are known from the transfer reactions 86Sr(d,~) [8] and 85Rb(p,d) [4]. To investigate excited states of higher spins in 84Rb the (~,n) reaction has mainly been employed. Targets of NaBr and NH~r with natural isotopic abundance have beer, bombarded with 13, 16, 19 and 27 MeV s-particles at the Rossendorf cyclotron. Excitation functions, angular distributions, y-y coincidences and nanosecond lifetimes have been measured using low-energy photon spectrometers. In addition, singles spectra have also been measured in the cross reactions 82Se(TLi,4n) and 80Se(7Li,3n) for an unambiguous assignment of y-rays to 84Rb. The results of these measurements are summarized in the level scheme given in fig. I. The placement of the 80.6 keV transition on top of the long-lived 6-isomer is supported by the two other deo~ay branches de-exciting the new 5 (+) level, where one branch is a cascade of 77.2 and 219.0 keV transitions with positive A 2 coefficients for both }'-rays. Thus, in connection with the excitation function a 5-assignment has been made for the level at 487.1 keV. For this 5-state and for the 5 (+) level half-lives of 9(2) ns and II(I) ns, respectively, have been deduced from the slopes of the background-corrected time distribu-tioz~s of the corresponding transitions. For the 80.6 keV y-ray (10+) 1759.4 bution is shown in fig. 2. L 1334.8

The magnetic moments of the 5/2 + state in 11vTe at 274.4 keV and of the 7/2 7 state in a2~Te at 443.1 keV have been determined as #exp(5/2+) = --0.75(5)n.m. and #exv(7/2+)= +0.63(7) n.m., respectively, using the TDPAD method and the reactions 115,119Sn(0~, 2 n) 117,121Te" An evaluation method is described which provides, in case of the normalized time differential pattern R(t) exhibits less than half of an oscillation period, a unique value of the Larmor frequency. The comparison of the measured magnetic moments with Nilsson-, soft rotor Coriolis-as well as core-particle coupling calculations gives valuable hints on the shape dependence of magnetic moments and, consequently, on the deformation of different states in the odd transitional nuclei ~7-~25Te" In the light of the core-particle coupling model the positive parity states of 117Te and 121Te are interpreted as the members of A J= 1 and A J=2 bands built on the sa/2, d3/2, ds/2 and g7/2 single-particle states, respectively.

Nuclear Reactions: 85Rb(e, xn), E=27 MeV; measured E~, Iv, TI/2. Deduced T1/2 in 85Rb, sty, 88y. Ge detectors. Generalized centroid-shift method.