Pm
Promethium-158
Protons (Z)
61
Neutrons (N)
97
Mass number
158
Half-Life
4.8 s
Abundance
---
Mass
157.937 u
Mass Excess
-59,106.1 keV
Spin
(0+)
Discovered
1987
Binding energy per nucleon
8,143 keV
Neutron separation energy
4,880 keV
Proton separation energy
9,901 keV
Decay Mode
- β⁻→Samarium-158100%
Decay chain
- PmPromethium-158Z 61 · N 974.8 s
- β⁻100%
- β⁻100%
- β⁻100%