Abstract
Collective properties of odd-Z ,117I and ,123Sb nuclei have been investigated via C,p2nI, N,2pnI, C,αp2nI, and ,122SnLi,α2n) ,123Sb reactions, using in-beam γ excitation, γ-γ coincidence, γ-W(θ) and pulsed-beam-γ measurements. The two collective features common to the Z>50 transition region were observed; the first, the occurrence of ΔJ=1 bands built on low-lying states, was found in all four nuclei, and the second, ΔJ=2 bands built on states, was seen in ,117I. The and band heads involve a 1 proton hole and a 1 quasiproton, respectively. The systematics of these band structures in the Z>50 transition region, which have been extended in this study, are presented and discussed in terms of collective interpretations.
- Received 24 August 1984
DOI:https://doi.org/10.1103/PhysRevC.31.456
©1985 American Physical Society