LEVELS IN ER-168 ABOVE 2 MEV AND THE ONSET OF CHAOS

Extremely high statistics gamma-gamma coincidence data for Er-168 have been recorded following thermal neutron capture on Er-167. The result s alter considerably recent experimental and theoretical work on Er-16 8 and affect conclusions concerning the quality of the K quantum numbe r in the neutron resonance region: earlier claims that K remains good and that this energy region is nonchaotic are shown to be based in par t on band assignments that need to be seriously reexamined.