Pm-145, or Promethium-145, is a radioactive isotope of the element Promethium. It has a half-life of approximately 17.7 hours, which means it takes that amount of time for half of a sample to decay. Pm-145 is primarily produced through the decay of Uranium and is used in various scientific applications, including research in nuclear physics. Due to its radioactivity, Pm-145 emits beta particles and gamma radiation. This makes it useful in certain types of nuclear batteries and as a tracer in radiolabeling studies. However, handling Pm-145 requires safety precautions to protect against radiation exposure.