Pm
Promethium-156
Protons (Z)
61
Neutrons (N)
95
Mass number
156
Half-Life
27.4 s
Abundance
---
Mass
155.931 u
Mass Excess
-64,166.8 keV
Spin
4+
Discovered
1986
Binding energy per nucleon
8,177 keV
Neutron separation energy
5,298 keV
Proton separation energy
9,172 keV
Decay Mode
- β⁻→Samarium-156100%
Decay chain
- PmPromethium-156Z 61 · N 9527.4 s
- β⁻100%
- β⁻100%
- β⁻100%