Sj. Zhu et al., IDENTIFICATION OF LEVELS IN SM-160 AND NEW HIGH-SPIN STATES IN SM-156,SM-158, Journal of physics. G, Nuclear and particle physics, 21(7), 1995, pp. 57-62
From gamma-gamma, x-x, x-gamma, and gamma-gamma-gamma coincidence stud
ies of spontaneous fission of Cf-252, Sm-160 levels were identified al
ong with new high spin states in Sm-156,Sm-158. New bands, beginning a
t 5(-) in Sm-156,Sm-158 are assigned a two-neutron configuration {5/2(
+)[642], 5/2(-)[523]}5(-). The J(1) and J(2) values for the yrast band
s increase smoothly with spin and neutron number and the differences i
n these values for corresponding transitions in neighbouring isotopes
are reasonably constant.