Standardization and determination of the total internal conversion coefficient of In-111.

Area of Science:

• Nuclear Physics
• Metrology
• Radiochemistry

Background:

• Accurate standardization of radionuclides like Indium-111 ((111)In) is crucial for various applications, including medical imaging and nuclear research.
• Existing methods for radionuclide standardization require precise calibration and validation.

Purpose of the Study:

• To standardize the radionuclide Indium-111 ((111)In) using a sophisticated 4πβ-γ coincidence system.
• To determine the total internal conversion coefficients for specific gamma transitions of (111)In.
• To validate the obtained results against existing literature data.

Main Methods:

• Utilized a 4πβ-γ coincidence system comprising a proportional counter and a High-Purity Germanium (HPGe) detector.
• Employed software coincidence system (SCS) for data acquisition.
• Determined activity via the extrapolation technique.
• Selected gamma-ray windows at 171 keV and 245 keV total absorption peaks.

Main Results:

• Successfully standardized (111)In, providing a reliable activity measurement.
• Determined the total internal conversion coefficients for the 171 keV and 245 keV gamma transitions.
• The experimental results showed good agreement with previously reported values in the literature.

Conclusions:

• The 4πβ-γ coincidence system and the employed methodology are effective for the accurate standardization of (111)In.
• The determined internal conversion coefficients contribute to a better understanding of the decay properties of (111)In.
• This work provides a validated method for radionuclide standardization and characterization.