Each kilogram of fission rhodium will contain 6.62 ng of Rh and 3.68 ng of Rh. As Rh decays by beta decay to either Ru (80%) (some positron emission will occur) or Pd (20%) (some gamma ray photons with about 500 keV are generated) and the excited state decays by beta decay (electron capture) to Ru (some gamma ray photons with about 1 MeV are generated). If the fission occurs in an instant then 13.3 grams of rhodium will contain 67.1 MBq (1.81 mCi) of Rh and 10.8 MBq (291 μCi) of Rh. As it is normal to allow used nuclear fuel to stand for about five years before reprocessing, much of this activity will decay away leaving 4.7 MBq of Rh and 5.0 MBq of Rh. If the rhodium metal was then left for 20 years after fission, the 13.3 grams of rhodium metal would contain 1.3 kBq of Rh and 500 kBq of Rh. Rhodium has the highest price of these precious metals ($440,000/kg in 2022), but the cost of the separation of the rhodium from the other metals needs to be considered, although recent high prices may create opportunity for consideration.