Abstract:
High-spin states in 176Ir have been investigated via the 149Sm(31P,4nγ) 176Ir reaction through excitation functions, X-γ and γ-γ coincidence measurements. Four rotational bands have been identified for the first time and their configurations are suggested on the basis of the existing knowledge of band structures in odd-odd nuclei as well as the measured in-band B(M1)/B(E2) ratios. Among the four bands observed, the πh 9/2⊗νi 13/2 and πi 13/2⊗νi 13/2 bands exhibit an anomalous signature splitting. The signature inversion point is observed in the former at I c = 18? which is consistent with expectations; this signature inversion spin in the πi 13/2⊗νi 13/2 band may be larger than 25?. The combined effects of Coriolis and p-n residual interactions involved in such an inversion phenomenon have been discussed qualitatively.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 14 December 2001 / Accepted: 29 January 2002
Rights and permissions
About this article
Cite this article
Zhang, Y., Oshima, M., Toh, Y. et al. Rotational bands and signature inversion phenomena in πh9/2⊗νi13/2 and πi13/2⊗νi13/2 structures in odd-odd 176Ir. Eur Phys J A 13, 429–433 (2002). https://doi.org/10.1140/epja/iepja1353
Issue Date:
DOI: https://doi.org/10.1140/epja/iepja1353