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Irradiation of natural tellurium produces almost entirely I-131 as the only radionuclide with a half-life longer than hours, since most lighter isotopes of tellurium become heavier stable isotopes, or else stable iodine or xenon.

However, the heaviest naturally occurring tellurium nuclide, Te-130 (34% of natural Te) absorbs a neutron to become tellurium-131, which beta-decays with a half-life of 25 minutes, to I-131.

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By contrast, other iodine radioisotopes are usually created by far more expensive techniques, starting with reactor radiation of expensive capsules of pressurized xenon gas.Iodine-131 is also one of the most commonly used gamma-emitting radioactive industrial tracer.A tellurium compound can be irradiated while bound as an oxide to an ion exchange column, and evolved I-131 then eluted into an alkaline solution.More commonly, powdered elemental tellurium is irradiated and then I-131 separated from it by dry distillation of the iodine, which has a far higher vapor pressure.Here’s the exact template I use – complete with budget built in and all: J’s Financial Snapshot.

If you’re not a spreadsheet guy and prefer something more automated (which is fine, whatever gets you to ), you might wanna grab yourself a free Personal Capital account.The element is then dissolved in a mildly alkaline solution in the standard manner, to produce I-131 as iodide and hypoiodate (which is soon reduced to iodide).and can be released in nuclear weapons tests and nuclear accidents.See fission product yield for a comparison with other radioactive fission products.I-131 is also a major fission product of uranium-233, produced from thorium.It has a radioactive decay half-life of about eight days.