The decay properties of Tm150 and Er150 (produced in Ni58 bombardments of Ru96) were investigated following on-line mass separation. The half-life of Tm150 was measured to be 2.20.2 s rather than the value of 3.5 s available in the literature. Based on its decay characteristics, we suggest that this high-spin Tm150 isomer has a spin assignment of 6-. Among the Er150 states fed by this 6- isomer is the yrast 4+ level (2294.8 keV) which up to now has been observed in neither 2-decay nor in-beam -ray studies. New transitions observed in Er150 decay establish several previously unknown levels in Ho150. While the additional rays reduce from 100% to 96% the feeding to the 476-keV state in Ho150 known earlier, the corresponding logft value is calculated to be 3.6, indicating that this is an allowed, 0+1+, beta transition. Photon intensities obtained for rays following the decay of the Ho150 low-spin isomer resolve inconsistent values measured in two previous investigations.
ASJC Scopus subject areas
- Nuclear and High Energy Physics