Pb
Lead-203m
Protons (Z)
82
Neutrons (N)
121
Mass number
203
Half-Life
6.21 s
Abundance
---
Mass
202.974 u
Mass Excess
-23,961.0 keV
Spin
13/2+
Discovered
1955
Binding energy per nucleon
7,873 keV
Neutron separation energy
6,091 keV
Proton separation energy
5,270 keV
Decay Mode
- γ→Lead-203100%
Decay chain
- PbLead-203Z 82 · N 1216.21 s
- γ100%
- EC100%