Periodic Table/Seaborgium/²⁶¹Sg

← 260Sg262Sg →

²⁶¹Sg

Seaborgium-261

Radioactive· Half-life: 183 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

106

Neutrons (N)

155

Mass Number (A)

261

Atomic Mass

261.115948AMU

Spin / Parity

3/2+

Binding E/A

7.132keV

Natural Abundance

Trace / None

Half-life

183 ms

Decay Modesoverview · half-life · α · β⁻ · β⁺

α

98.1%

β⁺

1.3%

SF

0.6%

Decay Chain

²⁶¹SgSeaborgium183 ms

α98.1%

β⁺²⁶¹Db1.30%

²⁵⁷RfRutherfordium5.00 s

α89.3%

β⁺²⁵⁷Lr9.40%

²⁵³NoNobelium1.57 min

α55.0%

β⁺²⁵³Md

²⁴⁹FmFermium1.60 min

α33.0%

β⁺²⁴⁹Es

²⁴⁵CfCalifornium45.0 min

β⁺64.7%

α²⁴¹Cm35.3%

²⁴⁵BkBerkelium4.95 d

EC99.9%

α²⁴¹Am0.12%

²⁴⁵CmCurium8.25 ky

α100.0%

²⁴¹PuPlutonium14.3 y

β⁻100.0%

α²³⁷U0.00%

²⁴¹AmAmericium433 y

α100.0%

²³⁷NpNeptunium2.14 My

α100.0%

30Mg²⁰⁷Tl4.00%

²³³PaProtactinium27.0 d

β⁻100.0%

²³³UUranium159 ky

α100.0%

24Ne²⁰⁹Pb7.20%

28Mg²⁰⁵Hg1.30%

²²⁹ThThorium7.92 ky

α100.0%

²²⁵RaRadium14.8 d

β⁻100.0%

²²⁵AcActinium9.92 d

α100.0%

¹⁴C²¹¹Bi5.30%

²²¹FrFrancium4.80 min

α100.0%

¹⁴C²⁰⁷Tl8.80%

β⁻²²¹Ra0.00%

²¹⁷AtAstatine32.6 ms

α100.0%

β⁻²¹⁷Rn0.01%

²¹³BiBismuth45.6 min

β⁻97.9%

α²⁰⁹Tl2.09%

²¹³PoPolonium3.71 μs

α100.0%

²⁰⁹PbLead3.23 h

β⁻100.0%

²⁰⁹BiBismuth20100000000 Gy

α100.0%

²⁰⁵TlThalliumSTABLE

22-step decay chain → stable · Primary path shown · branching ratios indicated

Other Isotopes of Seaborgium

258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273

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