Pm

Promethium-161m

Protons (Z)

61

Neutrons (N)

100

Mass number

161

Half-Life

890.0 ns

Abundance

---

Mass

160.947 u

Mass Excess

-49,121.0 keV

Spin

(13/2+)

Discovered

2015

Binding energy per nucleon

8,080 keV

Neutron separation energy

4,298 keV

Proton separation energy

9,690 keV

Decay Mode

γPromethium-161100%

Decay chain

Promethium-161Z 61 · N 100890.0 ns
γ100%
β⁻100%
β⁻100%
β⁻100%
β⁻100%
β⁻100%