Hassium Isotopes List of hassium isotopes

| Isotope | Half_life | Decay_mode | Discovery_year | Reaction |
|---|---|---|---|---|
| 269m Hs | 9.7 s | α | 2004 | 248 Cm( 26 Mg,5n) |
| 270 Hs | 3.6 s | α | 2004 | 248 Cm( 26 Mg,4n) |
| 271 Hs | ~4 s | α | 2004 | 248 Cm( 26 Mg,3n) |
| 272 Hs | 40? s | α, SF ? | unknown | — |
| 273 Hs | 0.24 s | α | 2004 | 285 Fl(—,3α) |
| 274 Hs | 1? min | α, SF ? | unknown | — |
| 275 Hs | 0.15 s | α | 2003 | 287 Fl(—,3α) |
| 276 Hs | 1? h | α, SF ? | unknown | — |
| 277 Hs | 2 s | α | 2009 | 289 Fl(—,3α) |
| 277m Hs ? | ~11 min ? | α | 1999 | 289 Fl(—,3α) |