Isotopes
| Isotope | Year discovered | discovery reaction |
|---|---|---|
| 252Lr | 2001 | 209Bi(50Ti,3n) |
| 253Lrg | 1985 | 209Bi(50Ti,2n) |
| 253Lrm | 2001 | 209Bi(50Ti,2n) |
| 254Lr | 1985 | 209Bi(50Ti,n) |
| 255Lr | 1970 | 243Am(16O,4n) |
| 256Lr | 1961? 1965? 1968? 1971 | 252Cf(10B,6n) |
| 257Lr | 1958? 1971 | 249Cf(15N,α3n) |
| 258Lr | 1961? 1971 | 249Cf(15N,α2n) |
| 259Lr | 1971 | 248Cm(15N,4n) |
| 260Lr | 1971 | 248Cm(15N,3n) |
| 261Lr | 1987 | 254Es + 22Ne |
| 262Lr | 1987 | 254Es + 22Ne |
Eleven isotopes of lawrencium plus one isomer have been synthesized with 262Lr being the longest-lived and the heaviest, with a half-life of 216 minutes. 252Lr is the lightest isotope of lawrencium to be produced to date.
Read more about this topic: Lawrencium