The gray (symbol: Gy) is the SI derived unit of absorbed dose, specific energy (imparted) and of kerma. Such energies are typically associated with ionising radiation such as X-rays or gamma particles or with other nuclear particles. It is defined as the absorption of one joule of such energy by one kilogram of matter (usually human tissue).
The gray was named after the British physicist Louis Harold Gray, a pioneer in the field of measurement of radium radiation and X-rays and their effects on living tissue, and was adopted as part of SI by the 15th CGPM in 1975. The SI unit replaces the traditional cgs unit, the rad (equivalent to 0.01 Gy), which remains common in industry in the United States, while “strongly discouraged” in the style guide for U.S. National Institute of Standards and Technology authors.
One gray is the absorption of one joule of energy, in the form of ionizing radiation, per kilogram of matter.
For xrays and gamma rays, these are the same units as the sievert (Sv)…
Learn How to Get Bartending Certified in a Two Week-Long Bartending Class
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How to Start:
What will you Learn?
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