Pm

Promethium-151

Protons (Z)

61

Neutrons (N)

90

Mass number

151

Half-Life

1.18 d

Abundance

---

Mass

150.921 u

Mass Excess

-73,386.0 keV

Spin

5/2+

Discovered

1952

Binding energy per nucleon

8,241 keV

Neutron separation energy

7,860 keV

Proton separation energy

6,995 keV

Decay Mode

β⁻Samarium-151100%

Decay chain

Promethium-151Z 61 · N 901.18 d
β⁻100%
β⁻100%
α100%
β⁻100%
α100%