“roentgen”的概念、定义、翻译、参考文献-科学参考

roentgen

Physics

The former unit of dose equivalent (see radiation units). It is named after the discoverer of X-rays, W. K. Roentgen.

Space Exploration

A unit of radiation exposure, used for X-rays and gamma rays. It is defined in terms of the number of ions produced in one cubic centimetre of air by the radiation. Exposure to 1 000 roentgens gives rise to an absorbed dose of about 870 rads (8.7 grays), which is a dose equivalent of 870 rems (8.7 sieverts).
The annual dose equivalent from natural sources in the UK is 1 100 microsieverts.

Chemistry

The former unit of dose equivalent (see radiation units). It is named after the discoverer of X-rays, Wilhelm Roentgen (1845–1923).

Chemical Engineering

A unit of measurement for ionizing electromagnetic radiation from X-rays and gamma rays, defined as the charge in air of 2.58 × 10⁻⁴ coulombs on all ions of one sign when all the electrons of both signs liberated are completely stopped by a mass of one kilogram of air. It is named after German physicist Wilhelm Konrad Röentgen (1845–1923) who discovered X-rays. A lethal dose to humans corresponds to an exposure of 200 roentgens over a five-hour period. The unit is no longer used.

Biology

The former unit of dose equivalent (see radiation units). It is named after the discoverer of X-rays, W. K. Roentgen (1845–1923).

单词	roentgen
释义	roentgen Physics The former unit of dose equivalent (see radiation units). It is named after the discoverer of X-rays, W. K. Roentgen. Space Exploration A unit of radiation exposure, used for X-rays and gamma rays. It is defined in terms of the number of ions produced in one cubic centimetre of air by the radiation. Exposure to 1 000 roentgens gives rise to an absorbed dose of about 870 rads (8.7 grays), which is a dose equivalent of 870 rems (8.7 sieverts). The annual dose equivalent from natural sources in the UK is 1 100 microsieverts. Chemistry The former unit of dose equivalent (see radiation units). It is named after the discoverer of X-rays, Wilhelm Roentgen (1845–1923). Chemical Engineering A unit of measurement for ionizing electromagnetic radiation from X-rays and gamma rays, defined as the charge in air of 2.58 × 10⁻⁴ coulombs on all ions of one sign when all the electrons of both signs liberated are completely stopped by a mass of one kilogram of air. It is named after German physicist Wilhelm Konrad Röentgen (1845–1923) who discovered X-rays. A lethal dose to humans corresponds to an exposure of 200 roentgens over a five-hour period. The unit is no longer used. Biology The former unit of dose equivalent (see radiation units). It is named after the discoverer of X-rays, W. K. Roentgen (1845–1923).
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