放射能
Meanings
radioactivity
The physical property of emitting radiation from atomic nuclei. Used in scientific and technical contexts.
The radioactivity level in this area is below the safety standard.
Colloquial use referring to radiation itself, often in everyday conversation about contamination or exposure. Technically, 放射線 is the precise term for radiation rays.
See also: 放射線
Radiation might be leaking.
radioactive material
Colloquial extension referring to radioactive substances. In formal contexts, 放射性物質 is preferred.
See also: 放射性物質
Radioactive material was scattered by the accident.
Usage patterns
- 放射能を浴びるto be exposed to radiation
The worker was exposed to radiation in the accident.
- 〈場所〉が放射能に汚染されるfor a place to be contaminated by radiation/radioactive material
That area became uninhabitable after being contaminated by radiation.
- 放射能が漏れるfor radioactive material/radiation to leak
It was reported that radiation leaked from the nuclear plant.
- 放射能を測定するto measure radioactivity levels
Experts measured the radioactivity in the food.
- 放射能の影響を受けるto be affected by radiation
Many residents were affected by the radiation.