Pm

Promethium-142n

Protons (Z)

61

Neutrons (N)

81

Mass number

142

Half-Life

67.0 µs

Abundance

---

Mass

141.916 u

Mass Excess

-78,313.0 keV

Spin

(13-)

Discovered

1974

Binding energy per nucleon

8,287 keV

Neutron separation energy

5,861 keV

Proton separation energy

1,410 keV

Decay Mode

γPromethium-142100%

Decay chain

Promethium-142Z 61 · N 8167.0 µs
γ100%
β⁺100%