Pm-147, or Promethium-147, is a radioactive isotope of the element Promethium. It has a half-life of about 2.62 days, which means it decays relatively quickly. This isotope is primarily produced in nuclear reactors and is used in various applications, including luminous paint and atomic batteries. Due to its radioactivity, Pm-147 emits beta particles, which can be harnessed for energy. It is also utilized in scientific research and as a source of radiation in certain types of devices. However, safety precautions are necessary when handling this isotope due to its radioactive nature.