Xenon-129 (Xe-129)

Identity

Protons

54

Neutrons

75

Mass number

129

Mass

128.9048 ± 0.0054 u

Mass excess

-88.696 MeV

Spin

1/2+*

Stability

stable

Natural occurrence

26.40 % of xenon

Produced by

• I-129
• Cs-129