Activity standardisation of ²¹⁰Pb by 4πα liquid scintillation counting method

Area of Science:

• Radiochemistry
• Nuclear Physics
• Analytical Chemistry

Background:

• Accurate measurement of ²¹⁰Pb activity is crucial in various scientific fields.
• Existing methods for ²¹⁰Pb determination can be complex and time-consuming.
• Separation of ²¹⁰Po from ²¹⁰Pb is key for precise activity quantification.

Purpose of the Study:

• To develop and validate efficient methods for determining ²¹⁰Pb activity.
• To utilize the decay product ²¹⁰Po for accurate ²¹⁰Pb quantification.
• To achieve high detection efficiency for ²¹⁰Po using liquid scintillation counting.

Main Methods:

• Determination of ²¹⁰Pb activity via its decay product ²¹⁰Po.
• Utilizing liquid scintillation counting (LSC) for pure alpha-emitting ²¹⁰Po detection.
• Developing two distinct precipitation methods for separating ²¹⁰Po from ²¹⁰Pb solutions.

Main Results:

• ²¹⁰Po was effectively separated from ²¹⁰Pb solutions using two novel precipitation techniques.
• Liquid scintillation counting achieved near-unity detection efficiency for the separated ²¹⁰Po.
• The relative standard uncertainty for ²¹⁰Pb activity concentration was determined to be less than 0.45%.

Conclusions:

• The developed methods provide a reliable approach for quantifying ²¹⁰Pb activity.
• The high detection efficiency for ²¹⁰Po enhances the accuracy of ²¹⁰Pb measurements.
• These methods offer a precise and efficient alternative for ²¹⁰Pb analysis.