U
Uranium-238m
Protons (Z)
92
Neutrons (N)
146
Mass number
238
Half-Life
280.0 ns
Abundance
---
Mass
238.054 u
Mass Excess
49,865.6 keV
Spin
0+
Discovered
1979
Binding energy per nucleon
7,559 keV
Neutron separation energy
3,596 keV
Proton separation energy
4,951 keV
Decay Mode
- γ→Uranium-23897.4%
- SF2.6%
Decay chain
- UUranium-238Z 92 · N 146280.0 ns
- γ97.4%
- α~100%
- β⁻100%
- β⁻100%
- α~100%
- α~100%
- α~100%
- α100%
- α99.98%
- β⁻100%
- β⁻99.976%
- α100%
- β⁻~100%
- β⁻~100%
- α100%