Isotopes
| Isotope |
Half-life |
Decay mode |
Discovery year |
Reaction |
|---|---|---|---|---|
| 267Ds ? | 0000000028 !2.8 μs | α | 1994 | 209Bi(59Co,n) |
| 268Ds | 000000100 !100? μs | α ? | unknown | — |
| 269Ds | 000000179 !179 μs | α | 1994 | 208Pb(62Ni,n) |
| 270Ds | 00000010 !100 μs | α, SF | 2000 | 207Pb(64Ni,n) |
| 270mDs | 0000060 !6.0 ms | α, IT | 2000 | 207Pb(64Ni,n) |
| 271Ds | 00000163 !1.63 ms | α | 1994 | 208Pb(64Ni,n) |
| 271mDs | 000069 !69 ms | α | 1994 | 208Pb(64Ni,n) |
| 272Ds | 001 !1? s | SF ? | unknown | — |
| 273Ds | 00000017 !170 μs | α | 1996 | 244Pu(34S,5n) |
| 274Ds | 002 !2? s | α, SF ? | unknown | — |
| 275Ds | 002 !2? s | α ? | unknown | — |
| 276Ds | 005 !5? s | α ? | unknown | — |
| 277Ds | 0000057 !5.7 ms | α | 2010 | 285Fl(—,2α) |
| 278Ds | 010 !10? s | α, SF ? | unknown | — |
| 279Ds | 00018 !0.18 s | α, SF | 2002 | 291Lv(—,3α) |
| 280Ds | 011 !11? s | SF ? | unknown | — |
| 281Ds | 011 !11 s | SF | 1999 | 289Fl(—,2α) |
| 281mDs ? | 222 !~3.7 min | α | 1999 | 289Fl(—,2α) |
Darmstadtium has no stable or naturally-occurring isotopes. Several radioactive isotopes have been synthesized in the laboratory, either by fusing two atoms or by observing the decay of heavier elements. Eight different isotopes of darmstadtium have been reported with atomic masses 267, 269–271, 273, 277, 279, and 281, although darmstadtium-267 is unconfirmed. Three darmstadtium isotopes, darmstadtium-270, darmstadtium-271, and darmstadtium-281, have known metastable states (although that of darmstadtium-281 is unconfirmed). Most of these decay predominantly through alpha decay, but some undergo spontaneous fission.
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