In the early 20th century in the US, gold contaminated with the radon daughter 210Pb entered the jewelry industry. This was from gold brachytherapy seeds that had held 222Rn, which were melted down after the radon had decayed.
In the early 20th century in the US, gold contaminated with the radon daughter 210.Pb entered the jewelry industry. This was from gold brachytherapy seeds that had held 222Rn which were melted down after the radon had decayed