Preparation of High Specific Activity $^{51}Cr$

  • Kim, Taeyoung (Chemistry Division, Atomic Energy Research Institute) ;
  • Kim, Young-Kuk (Chemistry Division, Atomic Energy Research Institute)
  • Published : 1971.03.01


High specific activity $^{51}$ Cr is mainly prepared by Szilard-Chalmers process from $K_2$CrO$_4$target. Usually the recoil atom, Cr* (III), is coprecipitated with Fe(III) as a scavenger to be separated from $K_2$CrO$_4$. A new preparation method has been developed, by adding 0.1N NaOH and $C_2$H$^{5}$ OH to the irradiated target solution, to precipitate Cr* (III) without any scavenger such as Fe(III). The new method gives the product of higher specific activity and better yield than that of other methods, in the shorter processing time. This method is compared with the conventional method and the French method, and following results are obtained: the new method gives specific activity more than twice that of the conventional method and better yield than the conventional method : the French method and the new method give similar specific activity, but yield of the new method is almost twice that of the French method.