Pm

Promethium-143

Protons (Z)

61

Neutrons (N)

82

Mass number

143

Half-Life

265.0 d

Abundance

---

Mass

142.911 u

Mass Excess

-82,960.7 keV

Spin

5/2+

Discovered

1952

Binding energy per nucleon

8,318 keV

Neutron separation energy

9,890 keV

Proton separation energy

4,300 keV

Decay Mode

ECNeodymium-143~100%
β⁺<5.7e-6%

Decay chain

Promethium-143Z 61 · N 82265.0 d
EC~100%