Cs

Caesium-119m

Protons (Z)

55

Neutrons (N)

64

Mass number

119

Half-Life

30.4 s

Abundance

---

Mass

118.922 u

Mass Excess

-72,260.0 keV

Spin

3/2+

Discovered

1978

Binding energy per nucleon

8,317 keV

Neutron separation energy

11,922 keV

Proton separation energy

1,470 keV

Decay Mode

β⁺Xenon-119100%

Decay chain

Caesium-119Z 55 · N 6430.4 s
β⁺100%
β⁺100%
β⁺100%
β⁺100%
EC100%