Study of positron emission from ³⁶Cl.

Area of Science:

• Nuclear Physics
• Radiochemistry

Background:

• Chlorine-36 (³⁶Cl) is a radioisotope with a weak positron emission branch.
• Accurate quantification of this branch is crucial for nuclear data and applications.

Purpose of the Study:

• To precisely determine the absolute intensity of the positron emission branch from ³⁶Cl.
• To validate experimental methods for measuring weak beta decay branches.

Main Methods:

• Utilized a 4πβ(Liquid Scintillator)-γ(High-Purity Germanium) coincidence system.
• Employed a liquid scintillation cocktail for efficient beta particle detection.
• Implemented timestamp and energy filtering for background reduction and clear observation of 511-keV gamma rays.

Main Results:

• The absolute intensity of the positron emission from ³⁶Cl was determined to be (1.62 ± 0.15) × 10⁻⁵.
• Achieved a practically background-free environment for measurement.
• Results are in agreement with existing literature values.

Conclusions:

• The β-γ coincidence technique is effective for quantifying weak positron emission branches.
• The determined intensity provides a reliable value for nuclear databases.
• This work validates the experimental setup for future precise measurements.