Darmstadtium - Isotopes

Isotopes

List of darmstadtium 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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