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английский)

promethium [брит. prəˈmiːθɪəm, америк. prəˈmiθiəm] СУЩ.

promethium

prométhium м.

Дополнительные переводы и характерные словосочетания с ключевым словом

promethium

английский

Promethium-147 is produced in large quantities (compared to other isotopes) by bombarding uranium-235 with thermal neutrons. en.wikipedia.org

Where indefinite self-luminosity in darkness was required, safer radioactive promethium paint was initially used, later replaced by tritium which continues to be used today. en.wikipedia.org

Promethium is also used to measure the thickness of materials by evaluating the amount of radiation from a promethium source that passes through the sample. en.wikipedia.org

Another method is to bombard uranium-238 with fast neutrons to cause fast fission, which, among multiple reaction products, creates promethium-147. en.wikipedia.org

Finally, promethium can be formed in nature as a product of spontaneous fission of uranium-238. en.wikipedia.org

Originally, radium-226 was used for the purpose, but it was later replaced by promethium-147 and tritium (hydrogen-3). en.wikipedia.org

Another way to produce promethium-147 is via neodymium-147, which decays to promethium-147 with a short half-life. en.wikipedia.org

Only the highly unstable and radioactive promethium rare earth is quite scarce. en.wikipedia.org

However, if the packaging is damaged, then promethium becomes dangerous to the environment and humans. en.wikipedia.org

Many properties of promethium rely on its position among lanthanides and are intermediate between those of neodymium and samarium. en.wikipedia.org

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английский