Pm

Promethium-154m

Protons (Z)

61

Neutrons (N)

93

Mass number

154

Half-Life

1.73 m

Abundance

---

Mass

153.926 u

Mass Excess

-68,490.0 keV

Spin

(1-)

Discovered

1958

Binding energy per nucleon

8,206 keV

Neutron separation energy

5,913 keV

Proton separation energy

8,449 keV

Decay Mode

β⁻Samarium-154100%

Decay chain

Promethium-154Z 61 · N 931.73 m
β⁻100%