What is the decay mode emitted from CS 137?
What is the decay mode emitted from CS 137?
Cesium-137 decays in the environment by emitting beta particles. As noted above, cesium-137 decays to a short lived decay product, barium-137m. The latter isotope emits gamma radiation of moderate energy, which further decays to a stable form of barium.
What is the activity of Cs 137?
Ba decays to the ground state by emission of photons having energy 0.6617 MeV. A total of 85.1% of 137Cs decays lead to gamma ray emission in this way. One gram of caesium-137 has an activity of 3.215 terabecquerel (TBq).
What is the half-life of Tc 99m?
6 hours
Technetium-99m is a short-lived form of Tc-99 that is used as a medical diagnostic tool. It has a short half-life (6 hours) and does not remain in the body or the environment for long.
What type of radiation is emitted from cesium-137?
Beta Particles
Type of Radiation Emitted: Beta Particles.
How does cesium-137 atoms cause tissue damage?
A Cs-137 atom emits radiation in the form of medium energy gamma rays, and to a lesser extent, high-energy beta particles, which disrupt molecules in cells and deposits energy in tissues, causing damage.
How do radionuclides decay?
Elements that emit ionizing radiation are called radionuclides. When it decays, a radionuclide transforms into a different atom – a decay product. The atoms keep transforming to new decay products until they reach a stable state and are no longer radioactive.
What is the decay scheme of Cs-137?
The decay scheme of Cs-137 can be seen below. The isotope generator contains up to 10 μCi (370 kBq) of Cs-137 bound on a special ion exchange medium. Using an eluting solution (which is forced through the isotope exchange column using a syringe) the Ba-137 is selectively extracted from the ion exchange medium leaving only the Cs-137.
What is the half life of Cs137?
1 Decay Scheme. Cs-137 disintegrates by beta minus emission to the ground state of Ba-137 (5,6 %) and via the 661 keV isomeric level of Ba-137 (94,4 %) which has a half-life of 2,55 min.
What is the decay product of Cesium 137?
Cesium-137 decays in the environment by emitting beta particles. As noted above, cesium-137 decays to a short lived decay product, barium-137m. The latter isotope emits gamma radiation of moderate energy, which further decays to a stable form of barium.
How is ba-137 extracted from Cs-137?
Using an eluting solution (which is forced through the isotope exchange column using a syringe) the Ba-137 is selectively extracted from the ion exchange medium leaving only the Cs-137. This process is called “milking the generator.” Download the Isotope Generator Operating Instructions.
