ANOMALOUS EXCITATION-ENERGY OF THE 2(1)(-LEVEL IN VIBRATION-LIKE NUCLEI())

It is shown that the excitation energies of the first excited states ( 2(1)(+)) in vibration-like nuclei are in a systematical way about 15% lower than the values expected from the global properties of these nuc lei. Unexpectedly, this is due to low 2(1)(+) level excitations and no t to high multiphonon level energies. This effect could only be reveal ed by considering many yrare multiphonon levels in addition to yrast l evels. It affects strongly the identification of such multiphonon stat es.