Americium-243 is a synthetic radioactive isotope of the element Americium, which is part of the actinide series in the periodic table. It was first produced in 1944 by scientists at the University of California, Berkeley. Americium-243 has a half-life of about 7,370 years, making it relatively stable compared to other isotopes. This isotope is primarily used in scientific research and has applications in nuclear reactors and radiological devices. Due to its long half-life, Americium-243 can be used in various studies related to nuclear waste management and the behavior of actinides in the environment.