Bk
Berkelium-239
Protons (Z)
97
Neutrons (N)
142
Mass number
239
Half-Life
1.67 m
Abundance
---
Mass
239.058 u
Mass Excess
54,250.0 keV
Spin
(7/2+)
Discovered
1989
Binding energy per nucleon
7,527 keV
Neutron separation energy
8,041 keV
Proton separation energy
2,484 keV
Decay Mode
- SF<0.01%
Decay chain
- BkBerkelium-239Z 97 · N 1421.67 m
- β⁺~100%
- β⁺~100%
- EC99.99%
- α~100%
- α~100%
- β⁻100%
- α~100%
- β⁻98.62%
- α100%
- α~100%
- α100%
- α~100%
- β⁻100%
- α~100%
- β⁻100%