Proton states in143Pm and145Pm populated in the (3He,d) reaction

The (3He,d) reaction on targets of142Nd,144Nd and on a target of natural Nd have been studied, using a beam of 24 MeV3He from the McMaster University Tandem Van de Graaff accelerator. The reaction products were analyzed with an Enge type magnetic spectrograph and recorded on photographic emulsions. Information on thel-values was obtained from the (3He,d) angular distribution. In the143Pm nucleus no fragmentation of the shell model strength was found while in the145Pm nucleus the fragmentation of thed3/2 ands1/2 states was significant, giving a total of 11l=2 and 51=0 transitions. The results are analyzed in terms of the spherical shell model and the agreement with pairing theory is excellent in both cases. A survey of the stripping strength to promethium isotopes with mass numbers ranging fromA=143 toA=151 is presented, using normalizations based on the results from the experiments on the target of natural neodymium.