High-spin states in ${}^{82}\mathrm{Rb}$ were studied through the ${}^{68}\mathrm{Zn}{(}^{18}\mathrm{O},p3n)$ reaction at 56 MeV beam energy via a thin target coincidence measurement. The known sequence of positive-parity states built on the $6^{+}$ state at 191.3 keV was extended up to spin 14, and signature inversion was observed around spin 11. Above spin 8 the observed properties of this band indicate a rotationlike structure. A new high-lying level sequence connected by $\Delta I=1\mathrm{}$ transitions was identified. This magnetic dipole sequence is built on a new ${(11\mathrm{}}^{-})$ level at 2617.3 keV excitation energy which is interpreted as a $\pi {(g}_{9/2}{)}^2\otimes \pi {(p}_{3/2}{,f}_{5/2})\otimes \nu g_{9/2}$ four-quasiparticle state at small quadrupole deformation.

• Received 22 July 1998

DOI:https://doi.org/10.1103/PhysRevC.59.71