What type of radiation does iodine-125 release?

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 is the use of iodine-125?

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 …

Is Iodine-125 stable or radioactive?

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.

How does I 125 Decay?

125 I decays with a half-life of 60 days. It emits soft gamma radiation and x-rays with a maximum energy of about 35 KeV; also emitted are conversion and auger electrons with a maximum energy of about 35 KeV.

How do you test for iodine-125?

Detection. A sodium iodide crystal scintillation detector is the preferred method for detecting I-125. G-M detectors are not likely to detect the presence of I-125 in amounts less than about 100,000 dpm (0.05 µCi).

What is the half-life of iodine 123?

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.

How do you test for iodine 125?

Why is iodine used in medical procedures?

Iodine is used to treat and prevent iodine deficiency and as an antiseptic. For iodine deficiency it can be given by mouth or injection into a muscle. As an antiseptic it may be used on wounds that are wet or to disinfect the skin before surgery.

Does iodine 125 occur naturally?

A radioactive isotope of iodine, a nonmetallic element of the halogen group. With a half-life of 60 days, iodine 125 occurs naturally and can be produced artificially. This agent has both therapeutic and diagnostic uses, particularly in thyroid disease.

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.