Kr

Krypton-87

Protons (Z)

36

Neutrons (N)

51

Mass number

87

Half-Life

1.27 h

Abundance

---

Mass

86.913 u

Mass Excess

-80,709.53 keV

Spin

5/2+

Discovered

1940

Binding energy per nucleon

8,675 keV

Neutron separation energy

5,515 keV

Proton separation energy

12,367 keV

Decay Mode

β⁻Rubidium-87100%

Decay chain

Krypton-87Z 36 · N 511.27 h
β⁻100%
β⁻100%