Isotopes of palladium
Open-knowledge reference entry
Natural palladium (46Pd) is composed of six stable isotopes, 102Pd, 104Pd, 105Pd, 106Pd, 108Pd, and 110Pd, although 102Pd and 110Pd are theoretically unstable. The most stable radioisotopes are 107Pd with a half-life of 6.5 million years, 103Pd with a half-life of 16.99 days, and 100Pd with a half-life of 3.63 days. Twenty-five other radioisotopes have been characterized ranging from 91Pd to 129Pd. Most of these have half-lives that are less than 30 minutes except 101Pd (8.47 hours), 109Pd (13.6 hours), and 112Pd (21.0 hours).
The primary decay mode before the most abundant stable isotope, 106Pd, is electron capture and the primary mode after is beta decay. The primary decay product before 106Pd is rhodium and the primary product after is silver.
Radiogenic 107Ag is a decay product of 107Pd and was first discovered in the Santa Clara meteorite of 1978. The discoverers suggest that the coalescence and differentiation of iron-cored small planets may have occurred 10 million years after a nucleosynthetic event. 107Pd versus Ag correlations observed in bodies, which have clearly been melted since accretion of the Solar System, must reflect the presence of short-lived nuclides in the early Solar System.
List of isotopes
Palladium-103
Palladium-103 is a radioisotope of the element palladium that has uses in brachytherapy for prostate cancer and uveal melanoma.
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