Pm
Promethium-148
Protons (Z)
61
Neutrons (N)
87
Mass number
148
Half-Life
5.37 d
Abundance
---
Mass
147.917 u
Mass Excess
-76,866.0 keV
Spin
1-
Discovered
1947
Binding energy per nucleon
8,268 keV
Neutron separation energy
5,895 keV
Proton separation energy
6,008 keV
Decay Mode
- β⁻→Samarium-148100%
Decay chain
- PmPromethium-148Z 61 · N 875.37 d
- β⁻100%
- α100%
- α100%