The radioisotope iodine-129 (half-life 15.7 million years) is produced naturally by the spontaneous fission of uranium and atmospheric spallation of xenon. Since the dawn of the nuclear age there has also been an anthropogenic input to the environment from weapons testing and nuclear fuels reprocessing. As a result there has been much interest in using iodine-129 as an environmental tracer. With our current instrumentation we can measure iodine-129/iodine-127 values as low as 5 x 10-14, and iodine concentrations as low as 105 atoms/gram of sample.
The following types of samples have been analyzed for iodine-129 concentrations and isotope ratios:
- Animal Tissues