Sm

Samarium-140

Protons (Z)

62

Neutrons (N)

78

Mass number

140

Half-Life

14.82 m

Abundance

---

Mass

139.919 u

Mass Excess

-75,456.0 keV

Spin

0+

Discovered

1967

Binding energy per nucleon

8,264 keV

Neutron separation energy

11,147 keV

Proton separation energy

5,244 keV

Decay Mode

β⁺Promethium-140100%

Decay chain

Samarium-140Z 62 · N 7814.82 m
β⁺100%
β⁺100%
EC100%
β⁺100%