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Isotopes of Fermium (click to see decay chain): 242Fm  243Fm  244Fm  245Fm  246Fm  247Fm  248Fm  249Fm  250Fm  251Fm  252Fm  253Fm  254Fm  255Fm  256Fm  257Fm  258Fm  259Fm  260Fm

249Fm     Half-life Fermion, 100p 149n 2.5968510736 m Spin 7/2 Parity 1 Hide Decay Modes Probability Mode Decay Energy Daughter 67% β+ 1.421MeV 249Es 33% α 7.808MeV 245Cf Hide Ultimate Decay Products Yield Nuclide 100.4227280303% 205Tl 6.965791236541×10-10% 207Pb Atomic Weight 249.079034 Abundance None Mass Excess 73.619MeV Binding Energy 7.461MeV Magnetic Moment N/A Quadrupole Moment N/A   Show Element Pictures. Also show decay chains leading to this isotope. Show only decays with probability >0.1%. Show Decay Image Full Size.

Decay chain image generated by Mathematica's GraphPlot and IsotopeData functions from Wolfram Research, Inc..