Pm

Promethium-131

Protons (Z)

61

Neutrons (N)

70

Mass number

131

Half-Life

6.3 s

Abundance

---

Mass

130.936 u

Mass Excess

-59,770.0 keV

Spin

(11/2-)

Discovered

1998

Binding energy per nucleon

8,163 keV

Neutron separation energy

12,371 keV

Proton separation energy

463 keV

Decay Mode

β⁺Neodymium-131100%

Decay chain

Promethium-131Z 61 · N 706.3 s
β⁺100%
β⁺100%
β⁺100%
β⁺100%
β⁺100%
β⁺100%
EC100%