Radionuclides measurements by the relative method through the germanium detector

The National Laboratory for Ionizing Radiation Metrology (LNMRI/IRD/CNEN) of Rio de Janeiro performed standardization of different radionuclides. Such standards are applied in nuclear industries, nuclear research, radiation protection and nuclear medicine. The comparative method using a Ge detector was applied for obtaining results of some radioactive point and ampoule sources. The activities of ²²Na, ⁶⁰Co, ¹³³Ba and ¹³⁷Cs radionuclides were determined. The total uncertainties reached values below 1.0 % to liquid samples and below 1.4% to solid samples, in a confidence level of 68 %. (author)