Untersuchung der Beschreibungsmöglichkeit des Selen 77 als deformierter Kern

Abstract

Some aspects of Selen 77 are discussed in the framework of the NILSSON model. The magnetic moment of the 248 keV state give hint fore the existence of a quadrupole force. The large quadrupole moment and the large COULOMB excitation- and (d,d′) -cross sections of some levels indicate collective features. The strong coupling model explains very well the ratio of the reduced B (E2) transition probability. The NILSSON model predicts the spin and the parity of the ground state and gives a better description of the lifetime of the 248 keV level than the spherical shell model. The magnetic moment of the ground state and the 248 keV state are explained by means of a spinpolarisation. The agreement of several values of the decoupling constant is fairly good. On the whole the description of Se77 by the NILSSON model appears to be comparable to the modest success of this model in some rare earth nuclei.