Why Is Iodine 131 Unstable?

How will I feel after radioactive iodine?

Some patients will experience mild neck discomfort or sore throat for a few days to weeks after radioactive iodine administration.

The radioactive iodine will induce an inflammatory process in the thyroid that will result in gradual destruction of thyroid tissue and reduction in the size of the gland..

Why does iodine 131 decay?

Iodine-131 is a beta emitter commonly used in nuclear medicine. The equation for its decay is: Note that both the charge and the mass are balanced and that iodine-131 emits both a gamma ray and a beta particle. For this reason, iodine-131 is known as a beta-gamma emitter.

Why is fluorine 18 unstable?

Fluorine-18 would be odd-odd with 9 protons and 9 neutrons. There are not many such cases – nuclei with even numbers of either protons or neutrons or both are more stable. … The odd-odd nuclei tend to be -unstable, therefore, and they decay to their even-even neighbors.

Can your thyroid grow back after radioactive iodine?

In almost all cases, your thyroid hormone levels will return to normal or below normal after radioactive iodine treatment. … Your thyroid nodule is unlikely to grow after being treated with radioactive iodine.

Is Iodine 131 naturally occurring?

People can be exposed to all forms of iodine through the food chain. However, current environmental levels of radioactive iodine are low. … The reason is that iodine-131 has a very short half life. Iodine-129 is naturally occurring in the environment, and it has also been produced by nuclear weapons testing.

Why is iodine 131 used to monitor thyroid?

use in medicine Iodine-131 has proved effective in treating hyperthyroidism. … Physicians employ iodine-131 to determine cardiac output, plasma volume, and fat metabolism and particularly to measure the activity of the thyroid gland where this isotope accumulates.

What are the side effects of iodine 131?

Because of this, radioactive iodine (RAI, also called I-131) can be used to treat thyroid cancer….Short-term side effects of RAI treatment may include:Neck tenderness and swelling.Nausea and vomiting.Swelling and tenderness of the salivary glands.Dry mouth.Taste changes.

How long does iodine 131 stay in the body?

How long does radioiodine stay in my body? The radioiodine from your treatment will temporarily remain in your body. Most of the radioiodine not taken up by your thyroid gland will be eliminated within the first (2) two days after treatment. Radioiodine leaves your body primarily by your urine.

Why are all elements above 82 unstable?

In the case of atoms of elements with a mass greater than 82, the level of binding energy does not allow stability. The force of repulsion between the particles that constitute the nucleus makes the atoms split and atoms of new elements are formed as they try to reach a nuclear configuration which is stable.

Why can radiation kill us?

When you eject electrons from atoms you can break chemical bonds, and that’s what leads to the microscopic and macroscopic damage that radiation causes.” By breaking those chemical bonds inside our bodies, ionizing radiation can destroy or damage critical components of our cells, leading to injury, and at high enough …

Why is iodine 131 harmful?

Ingested Iodine-131 is dangerous because it primarily affects the thyroid gland that plays a fundamental role in childhood development. … The isotope had been used since 1942, however, in the treatment of thyroid cancer. Though used in low doses for medical examinations, iodine 131 is an ideal tracer for use in humans.

Why are radioisotopes unstable?

Many elements have one or more isotopes that are radioactive. These isotopes are called radioisotopes. Their nuclei are unstable, so they break down, or decay, and emit radiation. … A: The nucleus may be unstable because it has too many protons or an unstable ratio of protons to neutrons.

What is the decay rate of iodine 131?

Iodine-131. Iodine-131 decays by beta emission and has a half-life of 8.04 days. The principal gamma emission of 364 keV is considerably higher than the ideal for imaging with gamma cameras. A ½-inch-thick sodium iodide crystal has only a 30% efficiency for these photons.

What does the body do with excess iodine?

Yes, if you get too much. Getting high levels of iodine can cause some of the same symptoms as iodine deficiency, including goiter (an enlarged thyroid gland). High iodine intakes can also cause thyroid gland inflammation and thyroid cancer.

How safe is radioactive iodine?

Radioactive iodine is an effective and safe treatment option for children and teenagers with an overactive thyroid gland, but will usually be given as a second-line treatment after a reasonably long course of antithyroid medication. It is used less commonly in younger children.