Americium-241 is a synthetic radioactive isotope of the element Americium, which was first produced in 1944. It has a half-life of about 432 years and is primarily used in smoke detectors, where it helps to detect smoke particles. This isotope emits alpha particles and gamma radiation, making it useful in various applications, including nuclear batteries and radiography. Due to its long half-life, Americium-241 can remain hazardous for many years, necessitating careful handling and disposal to protect human health and the environment.