What is the beta decay of iodine-129?

(Isotopes are different forms of an element that have the same number of protons in the nucleus but a different number of neutrons.) Iodine-129 decays by emitting a beta particle with a half-life of about 16 million years; the half-lives of all other iodine radionuclides are less than 60 days.

What is the resulting isotope when iodine-129 goes through beta decay?

I decays with a half-life of 15.7 million years, with low-energy beta and gamma emissions, to xenon-129 (129Xe).

What is the decay mode of iodine?

Iodine-131 has a half-life of 8.06 days and decays by beta-particle emission to a stable 131Xe.

What is the use of iodine-129?

Iodine-129. Used to check some radioactivity counters in in vitro diagnostic testing laboratories.

What is iodine 132 used for?

1. I is simple to prepare and use for measurement of thyroid function. 2. This isotope allows a reduction of radiation dosage, compared with 131I, of about 40 to 100 times to the thyroid, and of three to four times to the gonads.

Why is iodine 125 used in medicine?

Iodine-125 (125I) is a radioisotope of iodine with a half-life of 59.43 days and lower energy, and 125I seed implantation has been successfully used in radiation therapy as brachytherapy to treat a number of types of tumors, including prostate cancer, uveal melanomas, brain tumors, rectal carcinoma,2 advanced …

What are the side effects of iodine?

Side effects may include nausea and stomach pain, runny nose, headache, metallic taste, and diarrhea. In sensitive people, iodine can cause side effects including swelling of the lips and face (angioedema), severe bleeding and bruising, fever, joint pain, lymph node enlargement, hives, and death.

Where does iodine 129 and 131 come from?

I-129 is another isotope produced by the fission of Uranium-235. Within these fission products approximately 75% is I-131 and 25% is I-129. Iodine-129, although a result of nuclear fission in reactors, also occurs to a small extent in the upper atmosphere due to the interaction of high-energy particles with naturally-occurring xenon.

What causes the formation and decay of 129 I?

Formation and decay 129 I is one of seven long-lived fission products. It is primarily formed from the fission of uranium and plutonium in nuclear reactors. Significant amounts were released into the atmosphere as a result of nuclear weapons testing in the 1950s and 1960s.

What is the half life of iodine 124?

Iodine-124 is a proton-rich isotope of iodine with a half-life of 4.18 days. Its modes of decay are: 74.4% electron capture, 25.6% positron emission. 124I decays to 124Te. Iodine-124 can be made by numereous nuclear reactions via a cyclotron.

What are the health effects of iodine 131?

The negative health consequences of iodine-131 target the sensitive populations of the pregnant, unborn, babies and children up to 10 years of age most aggressively. If iodine-131 is inhaled or ingested it lingers in the body wherein it emits radioactive energy that results in internal damage mainly to the thyroid and parathyroid glands.