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In the August 2023 edition of Measure for Measure in Nature Physics, Dr Carine Michotte took the readers on a journey through a condensed history of radionuclide metrology, starting from its remarkable inception in 1913 – when Marie Curie introduced the first international standard for Ra-226 at the BIPM – and spanning to activity measurement standards, logistical challenges of comparison exercises for short-lived radionuclides, and glimpses of the BIPM travelling activity comparator. Driven by the emergence of new applications in nuclear medicine and corresponding standardization updates, the BIPM and several regional metrology organizations are currently exploring practicable solutions to address the growing demand for comparisons of radionuclides activity measurement.

Radionuclide activities | Nature Physics