Pm
Promethium-158m
Protons (Z)
61
Neutrons (N)
97
Mass number
158
Half-Life
---
Abundance
---
Mass
157.937 u
Mass Excess
-58,960.0 keV
Spin
(5+)
Discovered
2015
Binding energy per nucleon
8,142 keV
Neutron separation energy
4,734 keV
Proton separation energy
9,755 keV
Decay Mode
Decay chain
- PmPromethium-158Z 61 · N 97Unknown
- γ
- β⁻100%
- β⁻100%
- β⁻100%