HALF-LIVES AND Q-BETA MEASUREMENTS FOR NEW NUCLEI OF TC-89 AND TC-89M

Neutron deficient isotopes of Tc-89 and Tc-89m have been produced through the Ni-60(S-32, p 2n)Tc-89 at 95 MeV and the Ni-58(Cl-35, 2p 2n)Tc-89 reaction at 135 MeV. A rotating catcher foil system was used to collect the activities and transfer them to a measuring position for beta-gamma spectroscopy. The half-lives of Tc-89 and Tc-89m were measured to be 12.8 +/- 0.9 s and 12.9 +/- 0.8 s, respectively. The total decay energy, Q(EC), for Tc-89 was determined to be 7.51 +/- 0.21 MeV.