Properties of theπi13∕2⊗νi13∕2band in odd-oddAu184

High-spin level structure in Au-184 has been reinvestigated using the multidetector array of GASP via the Tb-159 (Si-29, 4ngamma)Au-184 reaction at a beam energy of 140 MeV. The ground-state band and the excited pii(13/2) circle times vi(13/2) 2-qp band have been extended up to lower and higher spin states. An upbend has been observed in the excited band at homegasimilar to0.25 MeV and is interpreted as resulting from a pair of pih(9/2) alignment. This low-frequency (pih(9/2))(2) alignment is supported by the measured B(M1)/B(E2) ratios and alignment properties in neighboring odd-A nuclei. The linking transitions between the two bands and to the ground state have been established leading to a firm spin-and-parity assignment for the pii(13/2) circle times vi(13/2) band in Au-184. This result provides strong evidence for the low-spin signature inversion in the pii(13/2) circle times vi(13/2) bands of odd-odd nuclei in the A similar to 180 mass region.