At first, the mixture was used as-is, both barium and lanthanum together, but this led to unpleasant radioactive contamination that took long time to disappear, due to the 12.5 days of half-life of barium-140.
This however led to unpleasant radioactive contamination that took long time to disappear, due to the 12.5 days of half-life of barium-140. At first, the mixture was used as-is, both barium and lanthanum together.
At first, the mixture was used as-is, both barium and lanthanum together. This however led to unpleasant radioactive contamination that took long time to disappear, due to the 12.5 days of half-life of barium-140.
At first, the mixture was used as-is, both barium and lanthanum together. This however led to unpleasant radioactive contamination that took long time to disappear, due to the 12.5 days of half-life of barium-140.