A study of levels in 147Nd using the (d,t) reaction

The 148 Nd(d,t) 147 Nd reaction has been studied using 12 MeV deuterons. The reaction products were analyzed with an Enge-type magnetic spectrograph and detected with photographic emulsions, giving peak widths (FWHM) of approximately 8 keV. The present results confirm previous indications that the highest energy proton group found in an early 146 Nd(d,p) investigation does not correspond to the ground state transition, but to the level at an excitation energy of 50 keV. The (d,t) angular distributions were used to determine l-values for a number of transitions. A striking similarity is noted with the energy levels and spectroscopic strengths previously found in the isotones 149 Sm and 151 Gd. With the exception of the h 11/2 state, it is possible to explain the observed strengths in terms of the spherical shell model, although there is fragmentation of the spherical states.