Cs

Caesium-127m

Protons (Z)

55

Neutrons (N)

72

Mass number

127

Half-Life

55.0 µs

Abundance

---

Mass

126.908 u

Mass Excess

-85,788.0 keV

Spin

(11/2-)

Discovered

1980

Binding energy per nucleon

8,408 keV

Neutron separation energy

9,508 keV

Proton separation energy

3,931 keV

Decay Mode

γCaesium-127100%

Decay chain

Caesium-127Z 55 · N 7255.0 µs
γ100%
β⁺100%
EC100%