Pm

Promethium-144

Protons (Z)

61

Neutrons (N)

83

Mass number

144

Half-Life

363.0 d

Abundance

---

Mass

143.913 u

Mass Excess

-81,416.1 keV

Spin

5-

Discovered

1952

Binding energy per nucleon

8,305 keV

Neutron separation energy

6,527 keV

Proton separation energy

4,703 keV

Decay Mode

ECNeodymium-144~100%
β⁺<8e-5%

Decay chain

Promethium-144Z 61 · N 83363.0 d
EC~100%
α100%