H Home Background Color: He Li Be Samarium Main Page Black White Gray B C N O F Ne Na Mg Samarium Pictures Page Al Si P S Cl Ar K Ca Samarium Technical Data Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og

Isotopes of Samarium (click to see decay chain): 128Sm  129Sm  130Sm  131Sm  132Sm  133Sm  134Sm  135Sm  136Sm  137Sm  138Sm  139Sm  140Sm  141Sm  142Sm  143Sm  144Sm  145Sm  146Sm  147Sm  148Sm  149Sm  150Sm  151Sm  152Sm  153Sm  154Sm  155Sm  156Sm  157Sm  158Sm  159Sm  160Sm  161Sm  162Sm  163Sm  164Sm  165Sm

139Sm     Half-life Fermion, 62p 77n 2.566666666667 m Spin 1/2 Parity 1 Show Decay Modes Hide Ultimate Decay Products Yield Nuclide 100% 139La Atomic Weight 138.922296605 Abundance None Mass Excess -72.380247MeV Binding Energy 8.243078MeV Magnetic Moment -0.53 μ Quadrupole Moment N/A   Show Isotope Symbols. Also show decay chains leading to this isotope. Show all decays, even very low-probability.

Click any isotope in diagram to see its data. Decay chain image generated by Mathematica's GraphPlot and IsotopeData functions from Wolfram Research, Inc..