Measuring radioactive methane with the liquid scintillation counter

Area of Science:

• Analytical Chemistry
• Radiochemistry
• Environmental Science

Background:

• Gas proportional counters are standard for measuring radioactive gases like methane.
• High nonradioactive methane concentrations cause quenching, limiting gas proportional counter use.
• Alternative methods are needed for accurate radioactivity measurement in complex gas mixtures.

Purpose of the Study:

• To develop and detail a liquid scintillation method for measuring radioactive methane and carbon dioxide.
• To address the limitations of gas proportional counters in the presence of high nonradioactive methane.
• To determine the solubility of methane in liquid scintillation cocktails.

Main Methods:

• Utilized a liquid scintillation counting technique for gas phase samples.
• Developed a detailed procedure for sample preparation and measurement.
• Quantified the solubility of methane in various liquid scintillation cocktails.

Main Results:

• The liquid scintillation method provides an effective alternative for measuring radioactive methane and carbon dioxide.
• Quenching issues associated with gas proportional counters are circumvented.
• Methane solubility data in scintillation cocktails were successfully determined.

Conclusions:

• Liquid scintillation counting is a viable and accurate method for quantifying radioactive methane and carbon dioxide, especially when nonradioactive methane is present.
• The developed procedure and solubility data facilitate improved radioactivity measurements in relevant gas mixtures.
• This method enhances the capability to study radioactive gases in environmental and industrial applications.