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Updated: Jan 31, 2026
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Carrier Lifetime Measurements in Semiconductors through the Microwave Photoconductivity Decay Method
Published on: April 18, 2019
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Standardisation and decay data of 186Re
1Centre for Ionising Radiation Metrology, National Physical Laboratory, Teddington, Middlesex, UK. denise.woods@npl.co.uk
Summary
This study standardized Rhenium-186 (186Re) using advanced coincidence techniques. Precise calibration factors and emission probabilities were determined for accurate radionuclide measurements.
Area of Science:
- Nuclear physics
- Radiochemistry
- Metrology
Background:
- Accurate standardization of radionuclides is crucial for various applications, including medical imaging and research.
- Rhenium-186 (186Re) is a radionuclide with applications in nuclear medicine.
Purpose of the Study:
- To standardize a solution of 186Re using the 4pi(PC)-gamma-coincidence technique.
- To determine calibration factors for ionization chambers and radionuclide calibrators.
- To measure X- and gamma-ray emission probabilities for 186Re.
Main Methods:
- Utilized a 4pi(PC)-gamma-coincidence counting technique with two gamma channels.
- Employed a two-dimensional extrapolation method for data analysis.
- Used an efficiency-calibrated germanium spectrometer for X- and gamma-ray measurements.
Main Results:
- Successfully standardized the 186Re solution.
- Determined calibration factors for a high-pressure re-entrant ionization chamber and the NPL secondary standard radionuclide calibrator.
- Measured emission probabilities of X- and gamma-rays for 186Re.
Conclusions:
- The applied coincidence technique provided accurate standardization of 186Re.
- The determined calibration factors and emission probabilities enhance the reliability of 186Re measurements.
- This work contributes to accurate metrology for radionuclides used in science and medicine.
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