What is the beta decay of cesium-137?
barium-137
Caesium-137 is a man-made radioactive isotope with a half-life of 32 years. It decays via β decay into barium-137. Of these decays 94.6 % lead to a metastable excited state of barium, Ba-137m, which passes into the ground state with a half-life of 156 s, whereby a γ quantum of 661.6 keV is emitted.
What is the decay constant for cesium-137?
Cs decays with a half-life of (30.05 ± 0.08) years [4] to either the 137Ba ground state, with emission of a β particle (Q = 1176 keV, 5.3%), or to 137mBa (Q = 514 keV, 94.7%) which rapidly (t1/2 = 2.552 min) decays to the 137Ba ground state with emission of a 661.7 keV γ photon.
What is the formula for cesium-137?
Cs
Cesium-137
| PubChem CID | 5486527 |
|---|---|
| Structure | Find Similar Structures |
| Molecular Formula | Cs |
| Synonyms | Cesium-137 Caesium-137 10045-97-3 (137Cs)caesium Cesium Cs-137 More… |
| Molecular Weight | 136.907089 |
What does cesium 135 become after beta decay?
Cs-135 decays via beta emission to Ba-135, which is stable. About 95% of the Cs-137 decays via beta emission to Ba- 137m, which has a half-life of 2.5 minutes and decays to stable Ba-137 via isomeric transition, thereby emitting a gamma ray.
When the nuclide cesium-137 undergoes beta decay the name of the product nuclide is fill in the blank 1?
As noted above, cesium-137 decays to a short lived decay product, barium-137m.
What type of radiation is emitted in the decay of 137 Cs to 137?
beta particles
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 long will it take for all the cesium-137 to decay into barium-137?
1. How long will it take for all of the cesium-137 to decay into barium-137? Theoretically it will never completely decay into barium-137. A small amount of cesium-137 will always remain.
Is cesium-137 a beta emitter?
Cesium-137 emits beta particles as it decays to the barium isotope, Ba-137m (half life = 2.6 minutes). How are people exposed to cesium-137? People may be exposed externally to gamma radiation emitted by cesium-137 decay products. If very high doses are received, skin burns can result.
How many protons and neutrons are in cesium-137?
Caesium-137
| General | |
|---|---|
| Symbol | 137Cs |
| Names | caesium-137, Cs-137 |
| Protons (Z) | 55 |
| Neutrons (N) | 82 |
Are caesium and cesium the same?
cesium (Cs), also spelled caesium, chemical element of Group 1 (also called Group Ia) of the periodic table, the alkali metal group, and the first element to be discovered spectroscopically (1860), by German scientists Robert Bunsen and Gustav Kirchhoff, who named it for the unique blue lines of its spectrum (Latin …
What is the balanced nuclear equation for beta decay of cesium-137?
A balanced nuclear equation for the beta decay of cesium-137 is as follows: C 55 137 s → e − 1 0 + B 56 137 a
What is the beta decay of Cs137?
137 55 Cs. It is also a β -emitter, which means it undergoes β -decay by a neutron decaying into a proton, releasing an electron. Protons and neutrons have the same mass, so the mass number doesn’t change. The atomic number increases by one, because one more proton is formed. This video shows a sample of Cs-137 being tested by a hand-held detector.
What is the half life of caesium 137?
137 Cs gamma spectrum. The characteristic 662 keV peak does not originate directly from 137 Cs, but from the decay of 137m Ba to its stable state. Caesium-137 has a half-life of about 30.17 years. About 94.6% decays by beta emission to a metastable nuclear isomer of barium: barium-137m ( 137m Ba, Ba-137m).
What is the mass number of Cesium 137?
Cesium-137 has an atomic number of 55, so is written as. #””_55^137Cs#. It is also a #beta#-emitter, which means it undergoes #beta#-decay by a neutron decaying into a proton, releasing an electron. Protons and neutrons have the same mass, so the mass number doesn’t change.