Na-22

Sodium-22 (Na-22) is a radioactive isotope of sodium that emits positrons and monochromatic gamma radiation with an energy of 1274.5 keV. With a half-life of 2.6019 years, it undergoes positron emission, transforming into neon-22. These properties make Na-22 valuable for scientific research and medical applications, particularly where precise radiation sources are required.

Na-22 is primarily used in positron annihilation spectroscopy as a reliable source of positrons for studying material structures. It is also utilized in the development of positron emission tomography (PET) systems, serving as a point source for calibration and testing. Additionally, Na-22 is investigated for its potential role in fusion energy research, specifically as a generator of "cold positrons" to produce muons for catalyzing deuterium fusion reactions.

This isotope is typically found in controlled environments such as research laboratories, medical facilities, and specialized nuclear research centers. Due to its artificial nature and specific applications, Na-22 is not encountered in everyday settings, and strict safety protocols ensure its secure handling and use.