Cs

Caesium-117

Protons (Z)

55

Neutrons (N)

62

Mass number

117

Half-Life

8.4 s

Abundance

---

Mass

116.929 u

Mass Excess

-66,490.0 keV

Spin

(9/2+)

Discovered

1972

Binding energy per nucleon

8,272 keV

Neutron separation energy

12,521 keV

Proton separation energy

732 keV

Decay Mode

β⁺Xenon-117100%

Decay chain

Caesium-117Z 55 · N 628.4 s
β⁺100%
β⁺99.997%
β⁺100%
β⁺100%
β⁺100%