Pm
Promethium-155
Protons (Z)
61
Neutrons (N)
94
Mass number
155
Half-Life
41.5 s
Abundance
---
Mass
154.928 u
Mass Excess
-66,940.0 keV
Spin
(5/2-)
Discovered
1982
Binding energy per nucleon
8,195 keV
Neutron separation energy
6,744 keV
Proton separation energy
8,649 keV
Decay Mode
- β⁻→Samarium-155100%
Decay chain
- PmPromethium-155Z 61 · N 9441.5 s
- β⁻100%
- β⁻100%
- β⁻100%