Xenon-133 (Xe-133)

Identity

Protons

54

Neutrons

79

Mass number

133

Mass

132.9 ± 2.6 u

Mass excess

-87.644 MeV

Spin

3/2+*

Stability

Half-life: 5.25 days

Natural occurrence

Not found in nature

Decays to

• beta minus → Cs-133