Pm
Promethium-133
Protons (Z)
61
Neutrons (N)
72
Mass number
133
Half-Life
13.5 s
Abundance
---
Mass
132.93 u
Mass Excess
-65,410.0 keV
Spin
(3/2+)
Discovered
1977
Binding energy per nucleon
8,204 keV
Neutron separation energy
11,851 keV
Proton separation energy
1,273 keV
Decay Mode
- β⁺→Neodymium-133100%
Decay chain
- PmPromethium-133Z 61 · N 7213.5 s
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- EC100%