Be

Beryllium-12m

Protons (Z)

4

Neutrons (N)

8

Mass number

12

Half-Life

233.0 ns

Abundance

---

Mass

12.029 u

Mass Excess

27,328.8 keV

Spin

0+

Discovered

2007

Binding energy per nucleon

5,533 keV

Neutron separation energy

920 keV

Proton separation energy

20,688 keV

Decay Mode

γBeryllium-12100%

Decay chain

Beryllium-12Z 4 · N 8233.0 ns
γ100%
β⁻99.5%
β⁻99.4%