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A new evaluation of the decay data for 166Ho
1Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, 20899-8462, USA.
Summary
A new evaluation of holmium-166 (¹⁶⁶Ho) decay data was performed. This provides updated nuclear and atomic data for this beta-emitter, crucial for its use in targeted cancer therapy.
Area of Science:
- Nuclear Physics
- Medical Physics
- Radiochemistry
Background:
- The beta-minus (β⁻) emitter holmium-166 (¹⁶⁶Ho) is a promising radionuclide for therapeutic medical applications.
- Accurate decay data is essential for the effective and safe use of radiolabeled therapeutics.
- Previous evaluations may not fully capture the nuances required for precise clinical applications.
Purpose of the Study:
- To conduct a comprehensive and rigorous evaluation of the decay data for holmium-166 (¹⁶⁶Ho).
- To provide updated and recommended values for key nuclear and atomic properties of ¹⁶⁶Ho.
- To support the development and application of ¹⁶⁶Ho as a radiolabel in medical therapies.
Main Methods:
- Utilized the established Decay Data Evaluation Project (DDEP) methodology for systematic data assessment.
- Performed a critical review of existing experimental data, including half-life, gamma-ray emission probabilities, and beta-minus branching ratios.
- Compiled and recommended a consistent set of nuclear and atomic data based on the evaluation.
Main Results:
- Presented new recommended values for the half-life of ¹⁶⁶Ho.
- Provided updated probabilities for gamma-ray emissions from ¹⁶⁶Ho decay.
- Established recommended values for beta-minus branching ratios and other relevant nuclear and atomic data.
Conclusions:
- The new decay data evaluation for ¹⁶⁶Ho offers improved accuracy for its nuclear and atomic properties.
- These refined data are vital for optimizing the use of ¹⁶⁶Ho in therapeutic radiolabeling applications.
- The complete dataset and evaluator comments are accessible via the DDEP website for further research and clinical implementation.
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