Selenium Radioactive

Radioactive selenium is a group of radioactive isotopes of selenium having mass numbers from 70 to 86. Radioactive selenium has a half-life ranging from 17 seconds to 65104 years. Isotopes of radioactive selenium are used in radioisotope diagnostics of diseases of the pancreas and other organs.

Selenium is a chemical element belonging to a group called nitrogen. Its most common isotope is the stable isotope selenium-74, but there are two other radioactive isotopes - Se-75 and Se-82. All of them are isomers of the so-called stable selenium-74. The properties and significance of these isotopes for various fields of medicine will be discussed below.

Selenium-75 (Se-75) Worldwide, the radiation hazards associated with radioactive substances, in particular their isotopes selenium-75, are the subject of review by the IAEA Commission on Radiation Safety. It was first discovered in late 1950 in Switzerland and immediately gained widespread use for its use as a power source in medical technology.