Radionuclide Pollution and Environmental Fate-Impact

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When is an isotope unstable (radioactive)?

1.  All Nuclei with Z > 84 are Unstable

2.  Very stable isotopes have “magic” Z

2, 8, 20, 50, 82 or 126

3.  Isotopes are stable in the “zone of stability”

Anthropogenic Occuring Radionuclides

Nuclear fission reactions

atomic bombs (incl. waste from weapons production)

nuclear fission reactor fuel

Americium -241 – Cesium -137 – Cobalt-60 – Iodine – Plutonium – Radium – Radon – Strontium – Technetium  Thorium – Tritium – Uranium

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