Cs

Caesium-135

Protons (Z)

55

Neutrons (N)

80

Mass number

135

Half-Life

1.33 My

Abundance

---

Mass

134.906 u

Mass Excess

-87,582.0 keV

Spin

7/2+

Discovered

1949

Binding energy per nucleon

8,401 keV

Neutron separation energy

8,762 keV

Proton separation energy

6,745 keV

Decay Mode

β⁻Barium-135100%

Decay chain

Caesium-135Z 55 · N 801.33 My
β⁻100%