Pm

Promethium-152m

Protons (Z)

61

Neutrons (N)

91

Mass number

152

Half-Life

7.52 m

Abundance

---

Mass

151.924 u

Mass Excess

-71,110.0 keV

Spin

(4-)

Discovered

1971

Binding energy per nucleon

8,225 keV

Neutron separation energy

5,795 keV

Proton separation energy

7,456 keV

Decay Mode

β⁻Samarium-152100%

Decay chain

Promethium-152Z 61 · N 917.52 m
β⁻100%