Ra 88 226 + n 0 1 ⟶ Ra 88 227 → 42.2   min β − Ac 89 227 {\displaystyle {\ce {^{226}_{88}Ra + ^{1}_{0}n -> ^{227}_{88}Ra -> ^{227}_{89}Ac}}} The reaction yield is about 2% of the radium weight.
Ra 88 226 + n 0 1 ⟶ Ra 88 227 → 42.2   min β − Ac 89 227 {\displaystyle {\ce {^{226}_{88}Ra + ^1_0n -> ^{227}_{88}Ra -> ^{227}_{89}Ac}}} Reaksi ini menghasilkan sekitar 2% dari berat radium.