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Isotopes of the Element Hassium

[Click for Main Data]

Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.

Naturally Occurring Isotopes

Hassium has no naturally occurring isotopes.

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
2630.74 millisecondsAlpha Decay<= 100.00%
Spontaneous Fission< 8.40%
264≈ 0.8 millisecondsAlpha Decay~ 50.00%
Spontaneous Fission~ 50.00%
2651.9 millisecondsAlpha Decay< 100.00%
Spontaneous Fission<= 1.00%
265m0.3 millisecondsAlpha Decay< 100.00%
2662.3 millisecondsAlpha Decay100.00%
Spontaneous Fission< 1.40%
26752 millisecondsAlpha Decay>= 80.00%
Spontaneous Fission< 20.00%
267m0.8 secondsAlpha Decay100.00%
2680.4 secondsAlpha DecayNo Data Available
2693.6 secondsAlpha Decay100.00%
269m9.7 secondsAlpha Decay100.00%
27022 secondsAlpha Decay100.00%
271No Data AvailableAlpha Decay (suspected)No Data Available
Spontaneous Fission (suspected)No Data Available
272No Data AvailableSpontaneous Fission (suspected)No Data Available
Alpha Decay (suspected)No Data Available
273No Data AvailableAlpha DecayNo Data Available
274No Data AvailableSpontaneous Fission (suspected)No Data Available
Alpha Decay (suspected)No Data Available
2750.15 secondsAlpha Decay100.00%
276No Data AvailableSpontaneous Fission (suspected)No Data Available
Alpha Decay (suspected)No Data Available
277No Data AvailableNo Data AvailableNo Data Available