Magnetic Rotation In ~(196)Pb

摘要

A detailed spectroscopic study of high-spin states in ~(196)Pb has been carried out using the EUROBALL spectrometer array. Five new magnetic-rotational bands have been found and the previously known bands have been extended. With one exception, all the bands have been connected to lower-lying states and excitation energies, spins and parities have been determined. Doppler-broadend lineshapes have been analyzed and lifetimes of states in four of the bands have been determined. The B(M1) values show the decrease with increasing spin that is expected for shears bands. Configurations of proton-particle excitations coupled to neutron-hole states have been assigned to the bands.