Pm
Promethium-133m
Protons (Z)
61
Neutrons (N)
72
Mass number
133
Half-Life
8.0 s
Abundance
---
Mass
132.93 u
Mass Excess
-65,280.0 keV
Spin
(11/2-)
Discovered
1996
Binding energy per nucleon
8,203 keV
Neutron separation energy
11,721 keV
Proton separation energy
1,143 keV
Decay Mode
Decay chain
- PmPromethium-133Z 61 · N 728.0 s
- β⁺
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- EC100%