The team smashed atoms of calcium – with atomic number 20 – into a sheet of americium – with atomic number 95 – and other labs around the world repeated their experiments over the next decade to confirm its existence.

该团队将原子序为 20 的钙原子原子序为 95 的镅，各地的其他实验室在接下来的十年中重复了他们的实验以证实其存在。