Magnetic dipole strength distribution at high excitation energies in deformed nuclei

Abstract

The distribution of magnetic dipole strength in the two rare earth nuclei 156Gd and 168Er has been studied both theoretically, in the framework of deformed QRPA, and experimentally, by inelastic electron scattering. The calculation yields a large amount of spin strength at high excitation energies with a maximum at about 8 MeV. In the electron scattering spectra, however, no strong signal is found, which leads to the conclusion that M1 strength at high energies must be strongly fragmented and very uniformly distributed.