| 词汇 | example_english_americium |
| 释义 | Examples of americiumThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. To determine the a-value, two discs were irradiated with an -241 americium source. In the case of plutonium, the material changes its characteristics over time, mainly as a result of the formation of americium 241. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Is it true, for example, that one was americium? From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Practically all the plutonium 241 and americium 241 remains indefinitely immobilised below the surface layer of seabed sediments. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 It is estimated that about one third of this had decayed to give some 5,560 curies of americium 241 by the end of 1982, the rest remaining as plutonium 241. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The americium-241 and curium-242 isotopes also were produced by irradiating plutonium in a nuclear reactor. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Am can be used for generating heavier americium isotopes by further neutron capture inside a nuclear reactor. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The alpha particles emitted by the decay of the americium collide with the light beryllium nuclei, producing fast neutrons. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Americium is a relatively soft radioactive metal with silvery appearance. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Americium is commonly used in industry as both an alpha particle and low photon energy gamma radiation source. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Uranium and thorium also have diverse current or historical uses, and americium is used in the ionization chambers of most modern smoke detectors. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. They checked for different radioactive substances including gamma emitters, plutonium, americium and strontium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Its toxicity is comparable to, but slightly lower than that of americium and plutonium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This was the fifth transuranium element discovered after neptunium, plutonium, curium and americium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A small source of radioactive americium is placed so that it maintains a current between two plates that effectively form an ionisation chamber. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The transuranium elements americium and curium also remain in the aqueous phase. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A large amount of work has been done on the solvent extraction of americium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Americium is produced mostly artificially in small quantities, for research purposes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Another proposed space-related application of americium is a fuel for space ships with nuclear propulsion. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the bones, americium is first deposited over cortical and trabecular surfaces and slowly redistributes over the bone with time. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Scarcity and high price yet hinder application of americium as a nuclear fuel in nuclear reactors. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Pu-243 has a half-life of only 5 hours, beta decaying to americium-243. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The element americium is created by bombarding plutonium with neutrons in a nuclear reactor. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The age of the plutonium can be established by measuring the ratio of plutonium-241 and its decay product, americium-241. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. With its half-life of 432.2 years, the americium in a smoke detector includes about 3% neptunium after 19 years, and about 5% after 32 years. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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