U

Uranium-239

Protons (Z)

92

Neutrons (N)

147

Mass number

239

Half-Life

23.45 m

Abundance

---

Mass

239.054 u

Mass Excess

50,572.7 keV

Spin

5/2+

Discovered

1937

Binding energy per nucleon

7,559 keV

Neutron separation energy

4,806 keV

Proton separation energy

7,610 keV

Decay Mode

β⁻Neptunium-239100%

Decay chain

Uranium-239Z 92 · N 14723.45 m
β⁻100%
β⁻100%
α~100%
α~100%
β⁻100%
α~100%
β⁻98.62%
α100%
α~100%
α100%
α~100%
β⁻100%
α~100%
β⁻100%