Pu
Plutonium-239m
Protons (Z)
94
Neutrons (N)
145
Mass number
239
Half-Life
193.0 ns
Abundance
---
Mass
239.053 u
Mass Excess
48,979.8 keV
Spin
7/2-
Discovered
1955
Binding energy per nucleon
7,559 keV
Neutron separation energy
5,255 keV
Proton separation energy
5,764 keV
Decay Mode
- γ→Plutonium-239100%
Decay chain
- PuPlutonium-239Z 94 · N 145193.0 ns
- γ100%
- α~100%
- α~100%
- β⁻100%
- α~100%
- β⁻98.62%
- α100%
- α~100%
- α100%
- α~100%
- β⁻100%
- α~100%
- β⁻100%