What does europium decay into?
Europium-152 decays both by emitting a beta particle (28%) and electron capture (72%). A second isotope of europium-150 having a half-life of 13 hours also exists. Values are given to two significant figures.
Is europium 154 stable or unstable?
List of isotopes
| Nuclide | Z | Decay mode |
|---|---|---|
| Excitation energy | ||
| 153Eu | 63 | Observationally Stable |
| 154Eu | 63 | β− (99.98%) |
| EC (.02%) |
What is the half-life of europium?
Europium deposited in the kidneys is assumed to be retained there with a biological half-life of 10 days. 3.
What is keV gamma?
Gamma rays from radioactive decay are in the energy range from a few kiloelectronvolts (keV) to approximately 8 megaelectronvolts (~8 MeV), corresponding to the typical energy levels in nuclei with reasonably long lifetimes. Gamma rays are ionizing radiation and are thus biologically hazardous.
What is the half life of Cs 137?
30 years
Cesium-137 is significant because of its prevalence, relatively long half life (30 years), and its potential effects on human health. Cesium-137 emits beta particles as it decays to the barium isotope, Ba-137m (half life = 2.6 minutes).
What is the half-life of cesium 137?
What is the half-life of BA 140?
12.8 days
BARIUM-140, one of the γ-ray emitting isotopes in fallout, has a physical half-life of 12.8 days.
How long does cesium-137 take to decay?
about 30.17 years
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 (137mBa, Ba-137m). The remainder directly populates the ground state of barium-137, which is stable.
Does cesium-137 produce gamma rays?
The most common radioisotope of cesium is cesium-137. It emits beta and gamma radiation, decaying to stable barium-137. Cesium-137 is widely used in gamma sources.
How does Cesium 137 decay in the environment?
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 cesium 134 produced in beta decay?
Cesium 134 is not produced via beta decay of other fission product nuclides of mass 134 since beta decay stops at stable 134 Xe. Cesium-134 undergoes beta (β−) decay, producing barium-134 directly and emitting gamma radiation.
What can Cesium 137 be used for in food?
Cesium-137 and its decay product, barium-137m, are used for sterilization activities for food products, including wheat, spices, flour, and potatoes. Cesium-137 is also used in a wide variety of industrial instruments such as level and thickness gauges and moisture density gauges.
What is the half life of cesium 134?
Cesium-134 has a half-life of 2.0652 years. It is produced both directly (at a very small yield because 134 Xe is stable) as a fission product and via neutron capture from nonradioactive 133 Cs (neutron capture cross section 29 barns), which is a common fission product.