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Standardization of 65Zn by sum-peak method.
E M Oliveira1, A Iwahara, R Poledna
1Laboratório Nacional de Metrologia das Radiacões Ionizantes (LNMRI/IRD/CNEN), Av. Salvador Allende, s/n, Recreio, CEP 22780-160 Rio de Janeiro, Brazil. estela@ird.gov.br
Summary
The sum peak method offers a simpler and more practical approach for standardizing Zinc-65 (65Zn) radioactivity. This method provides accurate results comparable to traditional ionization chambers.
Area of Science:
- Nuclear Physics
- Metrology
- Radiochemistry
Background:
- Accurate standardization of radioactive sources is crucial for various applications.
- Existing methods for Zinc-65 (65Zn) standardization can be complex and time-consuming.
Purpose of the Study:
- To evaluate the efficacy of the sum peak method for standardizing a commercial Zinc-65 (65Zn) solution.
- To compare the results obtained by the sum peak method with those from a traceable ionization chamber.
Main Methods:
- Standardization of a (65)Zn solution using the sum peak method with a planar high-purity germanium (HPGe) detector.
- Comparison of activity measurements with a well-type 4πγ ionization chamber traceable to BIPM standards.
Main Results:
- The sum peak method yielded an activity of 42.79 kBq/g.
- The ionization chamber provided a comparable activity of 42.74 kBq/g at the reference date.
- The sum peak method achieved a lower uncertainty (0.25%, k=1) compared to the ionization chamber (0.85%, k=1).
Conclusions:
- The sum peak method is a viable and accurate technique for (65)Zn standardization.
- This method presents advantages in terms of ease of use, simplicity, and practicality over other techniques.
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