What does iodine decay into?
I is a radioactive isotope of iodine that decays with a physical half life of 8 days to stable 131Xe, and releases radiation during the decay process by emitting beta particles (β−=electrons) and gamma (γ) radiation. The emitted gamma radiation can be detected by a gamma camera and can be used diagnostically.
What type of radiation is emitted by Iodine 125?
gamma rays
Iodine-125 is a commonly used radionuclide with a half-life of 60 days, emitting gamma rays with a maximum energy of 0.035 MeV (Million Electron Volts).
What type of decay is iodine?
beta decay
Due to its mode of beta decay, iodine-131 causes mutation and death in cells that it penetrates, and other cells up to several millimeters away.
What decay does iodine 123 undergo?
Iodine-123 decays by electron capture, with a photon energy of 159 keV and a half-life of 13 hours. The gamma emission of 123I allows excellent imaging (≈80% efficiency for a ½-inch-thick crystal) with low background activity.
What is iodine-131 Halflife?
Radioactive Iodine The 131I isotope has a half-life of 8 days and emits γ radiation and β particles. Given orally, it is concentrated in the thyroid, where the β particles destroy the gland.
How does iodine-131 work?
Radioactive iodine (I-131), an isotope of iodine that emits radiation, is used for medical purposes. When a small dose of I-131 is swallowed, it is absorbed into the bloodstream in the gastrointestinal (GI) tract and concentrated from the blood by the thyroid gland, where it begins destroying the gland’s cells.
Why is iodine-131 unstable?
A less stable form of iodine also has 53 protons (this is what makes it behave chemically as iodine) but four extra neutrons, for a total atomic weight of 131 (53 protons and 78 neutrons). With “too many” neutrons in its nucleus, it is unstable and radioactive, with a half-life of eight days.
What is the decay equation of iodine 123?
The isotope’s half-life is 13.22 hours; the decay by electron capture to tellurium-123 emits gamma radiation with a predominant energy of 159 keV (this is the gamma primarily used for imaging)….Iodine-123.
| General | |
|---|---|
| Half-life | 13.22 h |
| Parent isotopes | 123Xe |
| Decay products | 123Te |
| Isotope mass | 122.905589(4) u |
What is the decay process of iodine 131?
Iodine-131 (131I) is the most commonly used iodine radioisotope, and it decays mostly by beta-emission (606 keV; 90%). It is well-known for causing death of cells because it can penetrate other cells up to several millimeters away.
What is the half life of iodine 125?
iodine 125 a radioisotope of iodine having a half-life of 60.14 days and emitting gamma rays; used as a label in radioimmunoassays and other in vitro tests, and also for thyroid imaging. Symbol 125I. iodine 131 a radioactive isotope of iodine having a half-life of 8.04 days and emitting beta particles and gamma rays.
What is iodine 125 used for?
Jump to navigation Jump to search. Iodine-125 (125I) is a radioisotope of iodine which has uses in biological assays, nuclear medicine imaging and in radiation therapy as brachytherapy to treat a number of conditions, including prostate cancer, uveal melanomas, and brain tumors.
What is iodine 125?
Iodine-125 ( 125I) is a radioisotope of iodine which has uses in biological assays, nuclear medicine imaging and in radiation therapy as brachytherapy to treat a number of conditions, including prostate cancer, uveal melanomas, and brain tumors. It is the second longest-lived radioisotope of iodine, after iodine-129.