Th
Thorium-229m
Protons (Z)
90
Neutrons (N)
139
Mass number
229
Half-Life
7.0 µs
Abundance
---
Mass
229.032 u
Mass Excess
29,585.5 keV
Spin
(3/2+)
Discovered
1994
Binding energy per nucleon
7,635 keV
Neutron separation energy
5,257 keV
Proton separation energy
6,598 keV
Decay Mode
- γ→Thorium-229100%
Decay chain
- ThThorium-229Z 90 · N 1397.0 µs
- γ100%
- α100%
- β⁻100%
- α~100%
- α~100%
- α99.992%
- β⁻97.91%
- α100%
- β⁻100%
- α100%