Trace Sciences International

Xenon Isotopes

Nominal Mass
Accurate Mass
% Natural Abundance
Chemical Form
Enrichment Available %

124 Xe

123.9058942 (22)

0.09 (1)

gas

99+

126 Xe

125.904281 (8)

0.09 (1)

gas

99+

128 Xe

127.9035312 (17)

1.92 (3)

gas

99+

129 Xe

128.9047801 (21)

26.44 (24)

gas

80 – 99+

130 Xe

129.9035094 (17)

4.08 (2)

gas

99+

131 Xe

130.905072 (5)

21.18 (3)

gas

99+

132 Xe

131.904144 (5)

26.9 (6)

gas

99+

134 Xe

133.905395 (8)

10.44 (10)

gas

99+

136 Xe

135.907214 (8)

8.9 (16)

gas

99+

Of the nine stable Xenon Isotopes, several are used in various medical and scientific applications. Xe-124 is used in the production of two radioisotopes: I-123 and I-125. I-123 is used extensively in diagnostic procedures while I-125 is used in the treatment of prostate cancer. Hyperpolarized Xe-129 is used in the magnetic resonance imaging of gas flows in the lungs. Xe-136 has been proposed as a detector for neutrinoless double Beta decay research. Xe-126 can be used as a target for the production of radioactive Ba-128.