The ridge structure with Delta E-gamma=+/- 30 keV, observed in the past in
coincidence with protons emitted in the reaction 187 MeV Cl-37+ Sn-120 and
attributed to an hyperdeformed nuclear shape in Dy-152, has been studied in
a new experiment performed with the EUROBALL III array. The ridge is now o
bserved in coincidence with transitions in the yrast superdeformed band of
152Dy but no discrete rotational bands have been identified.