The following table shows the atomic nuclei that are isotonic (same neutron number N = 76) and isobaric (same nucleon number A = 129) with Iodine-129. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

2025年2月6日 · Iodine-129 and I-131 are the radioisotopes that are commonly used and will have the greatest impact on the environment if released. Iodine (chemical symbol I) is produced commercially for medical and industrial uses through nuclear fission.

Natural production rates of the 16 million-year iodine-129 from spontaneous fission and from cosmic-ray reactions are estimated to contribute a steady-state concentration of more than 10 -14 gram of I 129 per gram of I 127 to the hydrosphere, the atmosphere, and the biosphere.

Iodine-129 is produced naturally in the upper atmosphere. Iodine-129 and iodine-131 are also produced in nuclear explosions. In addition, iodine-129 is released at very low levels into the environment from facilities that separate and reprocess nuclear reactor fuels and from waste storage facilities. What are the uses of iodine?

2024年11月20日 · Iodine-129 atom is the isotope of iodine with relative atomic mass 128.904988, and nuclear spin 7/2. Iodine is a chemical element that has the symbol I and atomic number 53. Chemically, iodine is the second least reactive of the halogens, and the second most electropositive halogen; trailing behind astatine in both of these categories.

2009年1月26日 · In this article, we review the occurrence, sources, inventory, and concentration level of 129 I in environment and the method for speciation analysis of 129 I in the environment. Measurement techniques for the determination of 129 I are presented and compared.

Of the pollutants, iodine-129 is a long-lived radionuclide and will remain in the environment for millions of years. This work first report levels and inorganic speciation of 129 I in seawater depth profiles collected offshore Fukushima in June 2011.

Radioisotopes of iodine have been widely used in clinical diagnosis and therapy for various diseases, and in biomedical and environmental studies as a tracer of iodine or labeled compounds.

Iodine-129 is an environmentally important radionuclide with a half life of 1.57×10 7 y. The three main sources of 129 I in the environment are nature, nuclear weapons testing and power reactor operation.

2015年6月1日 · NCRP Report No. 75 evaluates the available information on iodine-129 in terms of its physical properties, production sources, physical transport, biological behavior, projected future production, waste management and its short- …