But as such, their data comes in a hodgepodge of units—see the Australian Radiation Protection and Nuclear Safety Agency for a good discussion of the difference between grays and sieverts.
The two SI units are the Gray (Gy), which indicates an actual dose received, and a Sievert (Sv), which is the dose equivalent, a joule of energy per kilogram.
Radiation is measured in terms of units that explain how much energy has been deposited: roentgen (R), the gray (Gy), and the sievert (Sv).
Frank Arne Sieverts was born in Frankfurt and grew up in the Milwaukee area, where his parents, Helmut and Cecelie Sieverts, settled after their flight from Germany.
"The Japanese authorities have stated that during medical examinations carried out at the National Institute of Radiological Sciences in the Chiba Prefecture, the level of local exposure to the workers' legs was estimated to be between 2 and 6 sieverts," the I.A.E.A. said on its Web site.
The phase constituent and hydrogen desorption of the powder mixture were investigated using X-ray diffraction (XRD) and a Sievert-type apparatus, respectively.
The pre-publication history for this paper can be accessed here: http://www.biomedcentral.com/1471-2407/10/362/prepub The authors kindly thank Karin Gerber and Kathrin Sievert-Küchenmeister for their excellent technical assistance in animal care.
In different terms, the risks for a UK population are 0.146 (95% CI: 0.065, 0.227) years of life lost per sievert and 8.61 years of life lost per radiation-induced death, and 0.162 years of life lost per sievert (95% CI: 0.018, 0.307) and 7.26 years of life lost per radiation-induced death, for IHD and CVA, respectively (Table 4).
Because the sievert and the rem are inconveniently large units for certain applications, the milligray (mGy; 1 mGy = 1/1000 Gy) and millisievert (mSv; 1 mSv = 1/1000 Sv) are often substituted.
In which the Simpsons describe the difference between a Becquerel, a Sievert and a Gray.The quest for a better insomnia drug (New Yorker)The philosophical implications of the Standard Model (Frank Wilczek; PDF).
