AbstractThe thermal-neutron capture cross sections for the reactions128Te (n,γ)129gTe and128Te (n,γ)129mTe have been measured by a neutron activation method, using gold as a standard. Samples of powdered tellurium enriched to 96.5% in128Te were measured by gamma spectrometry. The found values are 199.7±8 and 16.1±0.7 mb, respectively. The resonance integrals have been calculated by irradiating tellurium and gold, or cobalt, with and without cadmium covers; their values are 1.48±0.13 b and 77.4±5.2 mb, respectively.