| 释义 |
Definition of americium in English: americiumnoun ˌaməˈrɪsjəm mass nounThe chemical element of atomic number 95, a radioactive metal of the actinide series. Americium does not occur naturally and was first made by bombarding plutonium with neutrons. Example sentencesExamples - It was the first commercial manufacturer of plutonium and americium neutron sources for oil well, logging and other applications.
- Kept secret until after the war, they were respectively called americium and curium.
- Internal contamination with plutonium, americium, or curium can occur through a variety of routes including ingestion, inhalation, or direct contact through wounds.
- Trace levels of plutonium and americium from nuclear weapons tests in the 1960s can be found in most homes, as can radioactive isotopes of caesium from the Chernobyl accident in 1986.
- When americium was used as a target in this research, evidence for the formation of a new element was obtained.
Origin 1940s: from America (where it was first made) + -ium. Definition of americium in US English: americiumnoun The chemical element of atomic number 95, a radioactive metal of the actinide series. Americium does not occur naturally and was first made by bombarding plutonium with neutrons. Example sentencesExamples - Kept secret until after the war, they were respectively called americium and curium.
- It was the first commercial manufacturer of plutonium and americium neutron sources for oil well, logging and other applications.
- When americium was used as a target in this research, evidence for the formation of a new element was obtained.
- Trace levels of plutonium and americium from nuclear weapons tests in the 1960s can be found in most homes, as can radioactive isotopes of caesium from the Chernobyl accident in 1986.
- Internal contamination with plutonium, americium, or curium can occur through a variety of routes including ingestion, inhalation, or direct contact through wounds.
Origin 1940s: from America (where it was first made) + -ium. |