Sj. Zhu et al., HIGH-SPIN OCTUPOLE CORRELATIONS IN THE N=85, XE-139 AND BA-141 ISOTONES, Journal of physics. G, Nuclear and particle physics, 23(9), 1997, pp. 77-83
High spin states in Xe-139 and Ba-141 have been investigated using gam
ma-gamma- and gamma-gamma-gamma- coincidence studies of spontaneous fi
ssion of Cf-252. Alternating parity bands built on a 7/2-level are ass
igned up to spin I = (37/2) and I = (29/2) in Xe-139 and Ba-141, respe
ctively. Another possible octupole band based on vi(132)(f(7/2))(2) mu
ltiplet with spin up to (29/2) also is observed in both nuclei. Cascad
es of enhanced El transitions and B(EI)/B(E2) ratios indicate strong o
ctupole correlations. Systematics of the v(f(7/2))(3), v(f(7/2))(3) X
3(-) and vi(13/2)(f(7/2))(2) multiplets and bands in N = 85 isotones a
re presented.