Np

Neptunium-236m

Protons (Z)

93

Neutrons (N)

143

Mass number

236

Half-Life

22.5 h

Abundance

---

Mass

236.047 u

Mass Excess

43,438.0 keV

Spin

(1-)

Discovered

1949

Binding energy per nucleon

7,579 keV

Neutron separation energy

5,676 keV

Proton separation energy

4,770 keV

Decay Mode

Decay chain

Neptunium-236Z 93 · N 14322.5 h
EC50%
α~100%
α~100%
β⁻100%
β⁻100%
α~100%
α~100%
α100%
α100%
β⁻100%
β⁻64.046%
α100%