Radioisotope cesium-137
Radioisotope caesium-137 is one of the most common long-lived fission products of uranium-235 and plutonium-239. It is a beta- and gamma-emitter. The energy of beta-radiation is 0.514 MeV. The energy of photons is 0.661 MeV. The half-life period is 30 years. It belongs to group B of radiation hazard. The critical organ for soluble caesium is the whole body, liver, spleen, muscles; for insoluble caesium it is lungs and gastrointestinal tract (GIT). Acceptable volume activity DOA in atmospheric air is 29.0 Bq/m³ (7.84 - 13 Ki/l), acceptable specific activity DOA in water is 96.0 Bq/kg (2.59 - 9 Ki/kg)
Source: "RULES FOR ENSURING SANITARY AND HYGIENIC REGIMES DURING CONSTRUCTION AND OPERATION OF THERMAL ENERGY COMPLEX OBJECTS IN AREAS OF RADIOACTIVE CONTAMINATION"
(approved by the Ministry of Fuel and Energy of Russia 20.11.96)
Морфология
Род
Понятие «радионуклид цезий-137» мужского рода.
Склонение и число
| Падеж | Единственное число | Множественное число |
|---|---|---|
| Р | радионуклида цезий-137 | радионуклидов цезий-137 |
| Д | радионуклиду цезий-137 | радионуклидам цезий-137 |
| В | радионуклид цезий-137 | радионуклиды цезий-137 |
| Т | радионуклидом цезий-137 | радионуклидами цезий-137 |
| П | радионуклиде цезий-137 | радионуклидах цезий-137 |