Pm

Promethium-141

Protons (Z)

61

Neutrons (N)

80

Mass number

141

Half-Life

20.9 m

Abundance

---

Mass

140.914 u

Mass Excess

-80,523.0 keV

Spin

5/2+

Discovered

1952

Binding energy per nucleon

8,304 keV

Neutron separation energy

10,382 keV

Proton separation energy

3,555 keV

Decay Mode

β⁺Neodymium-141100%

Decay chain

Promethium-141Z 61 · N 8020.9 m
β⁺100%
β⁺100%