Nuclear spectroscopy of neutron-rich odd-a nuclei.

Abstract

The beta decay of the nuclei ('99)Sr, ('145)Cs, and ('147)La have been studied using the gamma-single, gamma multiscale and gamma-gamma coincidence measurements. The activities were produced using the on-line mass separator TRISTAN at Brookhaven National Laboratory. The half-life of each nuclei was determined using the multi-scale data. On the basis of coincidence data the decay schemes were constructed. Finally, for explaining the result of ('99)Sr beta decay the transitional region around A = 100 was discussed. The results of the ('145)Cs and ('147)La beta decay were compared with the relevant isotopes and N = 89 isotone.