Abstract
Low-lying electric and magnetic dipole excitations in the transitional nucleus Nd have been studied in nuclear resonance fluorescence experiments performed with a bremsstrahlung beam (end point energy 4.1 MeV). The use of high-resolution -ray spectrometers and a sectored single-crystal Compton polarimeter provided detailed information on excitation energies, spins, parities, decay widths, transition probabilities, and branching ratios of numerous new spin-1 states in Nd. The strong 1 excitation at 2185 keV in this = 84 nucleus is interpreted as the quadrupole-octupole coupled two-phonon excitation which has been observed systematically in the neighboring = 82 isotones. The decay properties of this 1 state are compared with the systematics of the low-lying 1 levels in the other even-even, stable Nd isotopes. The 1 excitations in Nd are discussed with respect to the deformation dependence of the orbital 1 “scissors mode,” the so-called “ law,” which has been studied previously in the other stable even-even Nd nuclei and in the Sm isotopes.
- Received 4 April 1997
DOI:https://doi.org/10.1103/PhysRevC.56.1256
©1997 American Physical Society