Low-spin signature inversion in the πi13/2vi13/2 band of 184Au
G. de AngelisN. MargineanA. GadeaD.R. NapoliM. AxiotisC. RusuT. MartinezM. OshimaY. Toh
Istituto Nazionale di Fisisca Nucleare, Laboratori Nazionali di Legnaro, Legnaro, Italy Hahn-Meitner-Institut, Berlin, GermanyJapan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319-1195, Japan
摘要：<正> High-spin states in 184Au have been populated via the 149Sm (29Si, 4nγ)184Au reaction at a beam energy of 140 MeV. Three-or higher-fold γ-ray coincidences have been meusured using the multidetector array of GASP. The rotational bands based on the πh9/2 v7/2- and πi13/2 vi13/2 configurations have been observed and extended to higher spin states. Particularly, 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 πi13/2 vi13/2 band in 184Au. This result provides a strong evidence for the low-spin signature inversion in the πi13/2 vi13/2 bands of odd-odd nuclei in the A～180 mass region.