Quasirotational groundstate bands of even-even nuclei with 50≦N, Z≦82
The quasirotational groundstate bands of140Sm,142Sm,144Gd and136Nd have been determined by studying the prompt γ-decay after (α,xn+yp+zα.) reactions using α-particles of up to 104 MeV and targets of144Sm,142Nd,141Pr,140Ce,136Ce and139La. The new levels continue the trends of the neighbouring even-even nuclides smoothly. These systematics of the groundstate bands in the region 50<N,Z<82 are not disturbed by expected subshell closure effects.