Np

Neptunium-229

Protons (Z)

93

Neutrons (N)

136

Mass number

229

Half-Life

4.0 m

Abundance

---

Mass

229.036 u

Mass Excess

33,800.0 keV

Spin

(5/2+)

Discovered

1968

Binding energy per nucleon

7,606 keV

Neutron separation energy

8,101 keV

Proton separation energy

2,709 keV

Decay Mode

Decay chain

Neptunium-229Z 93 · N 1364.0 m
α68%
α100%
α100%
α100%
α100%
α100%