Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.
All Known Isotopes of the Element Dubnium
| Mass Number | | Half-life | | Decay Mode | | Branching Percentage | | | 255 | | 1.6 seconds | | Alpha Decay | | ~ 80.00 | | | | | | Spontaneous Fission | | ~ 20.00 | | | 256 | | 1.9 seconds | | Alpha Decay | | <= 90.00 | | | | | | Spontaneous Fission | | <= 40.00 | | | | | | Electron Capture | | ~ 35.00 | | | 257 | | 0.76 seconds | | Alpha Decay | | >= 94.00 | | | | | | Spontaneous Fission | | <= 6.00 | | | 257m | | 1.50 seconds | | Alpha Decay | | >= 81.00 | | | | | | Spontaneous Fission | | 19.00 | | | 258 | | 4.0 seconds | | Alpha Decay | | 67.00 | | | | | | Electron Capture | | 33.00 | | | | | | Spontaneous Fission | | < 1.00 | | | 258m | | 20 seconds | | Electron Capture | | ~ 100.00 | | | 259 | | No Data Available | | No Data Available | | No Data Available | | | 260 | | 1.52 seconds | | Alpha Decay | | >= 90.40 | | | | | | Spontaneous Fission | | <= 9.60 | | | | | | Electron Capture | | < 2.50 | | | 261 | | 1.8 seconds | | Alpha Decay | | >= 82.00 | | | | | | Spontaneous Fission | | <= 18.00 | | | 262 | | 35 seconds | | Alpha Decay | | ~ 67.00 | | | | | | Spontaneous Fission | | No Data Available | | | 263 | | 27 seconds | | Spontaneous Fission | | 57.00 | | | | | | Alpha Decay | | 43.00 | | | 264 | | No Data Available | | No Data Available | | No Data Available | | | 265 | | No Data Available | | No Data Available | | No Data Available | | | 267 | | 73 minutes | | Spontaneous Fission | | No Data Available | | | 268 | | 16 hours | | Alpha Decay | | No Data Available | | | | | | Electron Capture | | No Data Available | | | | | | Spontaneous Fission | | No Data Available | |
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