Pm

Promethium-147

Protons (Z)

61

Neutrons (N)

86

Mass number

147

Half-Life

2.62 y

Abundance

---

Mass

146.915 u

Mass Excess

-79,042.0 keV

Spin

7/2+

Discovered

1947

Binding energy per nucleon

8,284 keV

Neutron separation energy

7,659 keV

Proton separation energy

5,405 keV

Decay Mode

β⁻Samarium-147100%

Decay chain

Promethium-147Z 61 · N 862.62 y
β⁻100%
α100%