One of the unusual features of neutron-rich A⋍100 nuclei is the sudden change of nuclear shape. The analysis of B(E2) and B(M1) values from recent level lifetime measurements indicates that Sr nuclei (and perhaps also Y) nuclei obtain maximal deformations for the nuclei at the onset of deformation, which suggests a “phase change” from a spherical to a maximally deformed nuclear shape.
Yong Ho ParkHitoshi HashimotoRyuzo Watanabe