Sievert
Videos
The sievert is a derived unit in the International System of Units intended to represent the stochastic health risk of ionizing radiation, which is defined as the probability of causing radiation-indu
Display of background radiation in a hotel at Naraha, Japan, showing dose rate in microsieverts per hour, five years after the Fukushima disaster
US Department of Energy 2010 dose chart in sieverts for a variety of situations and applications
Roentgen (unit)
Videos
The roentgen or röntgen is a legacy unit of measurement for the exposure of X-rays and gamma rays, and is defined as the electric charge freed by such radiation in a specified volume of air divided by
Sievert
…SI unit curie Ci 3.7×1010 s−1 1953 3.7×1010 Bq rutherford Rd 106 s−1 1946 1000000 Bq Exposure (X) coulomb per kilogram C/kg C⋅kg−1 of air 1974 SI unit röntgen R esu / 0.001293 g of air 1928 2.58×10−4 C/kg Absorbed dose (D) gray Gy J⋅kg−1 1974 SI unit erg per gram erg/g erg⋅g−1 1950 1.0×10−4 Gy rad rad 100…
Display of quartz fiber dosimeter, in units of roentgen.