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Updated: Aug 5, 2026
10:54
Dissolution Dynamic Nuclear Polarization Instrumentation for Real-time Enzymatic Reaction Rate Measurements by NMR
Published on: February 23, 2016
Disintegration rate measurement of a 192Ir solution
K A Fonseca1, M F Koskinas, M S Dias
1Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP), Serviço de Calibração e Dosimetria, Pinheiros, São Paulo, SP, Brazil.
Summary
The disintegration rate of Iridium-192 was precisely measured using advanced coincidence techniques. Results were validated against international standards, ensuring accuracy in radioactivity measurements.
Area of Science:
- Nuclear Physics
- Metrology
- Radiochemistry
Background:
- Accurate measurement of radionuclide disintegration rates is crucial for various applications, including medical imaging and radiation dosimetry.
- Iridium-192 (192Ir) is a widely used radionuclide, necessitating precise characterization of its decay properties.
Purpose of the Study:
- To accurately measure the disintegration rate of 192Ir.
- To validate the measurement against international standards.
- To contribute to the reliability of radioactivity measurements.
Main Methods:
- Utilized the 4π beta-gamma coincidence technique for high-efficiency detection.
- Applied corrections for the low electron capture (EC) contribution (4.5%) using literature decay scheme data.
- Collaborated with the Laboratório Nacional de Metrologia das Radiações Ionizantes (IRDDM) for independent verification.
Main Results:
- The disintegration rate of 192Ir was determined with high precision.
- Independent measurements using different techniques yielded consistent results.
- The obtained values were compared with the Systéme International Reference (SIR) maintained at the Bureau International des Poids et Mesures.
Conclusions:
- The study successfully measured the disintegration rate of 192Ir.
- The results demonstrate consistency with international metrology standards.
- This work enhances the accuracy and reliability of 192Ir radioactivity measurements.
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