Isotopes
| Isotope | Year discovered | discovery reaction |
|---|---|---|
| 258Sg | 1994 | 209Bi(51V,2n) |
| 259Sg | 1985 | 207Pb(54Cr,2n) |
| 260Sg | 1985 | 208Pb(54Cr,2n) |
| 261gSg | 1985 | 208Pb(54Cr,n) |
| 261mSg | 2009 | 208Pb(54Cr,n) |
| 262Sg | 2001 | 207Pb(64Ni,n) |
| 263mSg | 1974 | 249Cf(18O,4n) |
| 263gSg | 1994 | 208Pb(64Ni,n) |
| 264Sg | 2006 | 238U(30Si,4n) |
| 265Sg | 1993 | 248Cm(22Ne,5n) |
| 266Sg | 2004 | 248Cm(26Mg,4n) |
| 267Sg | 2004 | 248Cm(26Mg,3n) |
| 268Sg | unknown | |
| 269Sg | 2010 | 242Pu(48Ca,5n) |
| 270Sg | unknown | |
| 271Sg | 2003 | 242Pu(48Ca,3n) |
There are 12 known isotopes of seaborgium (excluding meta-stable and K-spin isomers). The longest-lived is currently 269Sg which decays through alpha decay and spontaneous fission, with a half-life of around 2.1 minutes. The shortest-lived isotope is 258Sg which also decays through alpha decay and spontaneous fission. It has a half-life of 2.9 ms.
Read more about this topic: Seaborgium