Gray (Gy)
Symbol: Gy
Conversion Factor: 1.000000 (Base Unit)
Grey is the SI unit for absorbed dose of ionizing radiation. One joule of energy absorbed per kilogram of matter is equivalent to one gray. Grey measures the amount of energy absorbed by an object or person through radiation.
Applications: Medical Radiation therapy, radiation protection, radiological dosages assessment.
Sievert (Sv)
Symbol: Sv
Conversion Factor: 1.000000
Description: Sievert is a unit that calculates the biological effects of ionizing radiation according to the radiation type and living tissue. It assists in the judgment for assessing possible health effects due to radiation exposure.
Use: Health physics, dosimetry, and radiological protection as a measuring tool on the safety of workers or the public when exposed to radiation.
Rad (rad)
Symbol: rad
Conversion Factor: 0.010000
Definition: The rad is a non-SI unit of absorbed radiation dose equivalent to 0.01 Gray. It gives the energy deposited in a substance due to ionizing radiation.
Applications: Often applied in medicine and radiological science before the introduction of Gray.
Rem (rem)
The symbol for rem is: rem
Conversion Factor: 0.010000
Description: The rem (Roentgen equivalent man) is a measure of the biological effect of ionizing radiation, just like the Sievert; it weighs the absorbed dose in terms of its biologic effect.
Applications: Applied in some of the old standards of radiation protection in the United States, much more until measurement of a human exposure to radiation.
Becquerel (Bq)
Symbol : Bq
Conversion Factor: 1.000000
Definition: Becquerel is the SI unit of radioactivity and is defined as one decay per second, representing the rate at which radioactive material decays.
Usage: It finds wide usage in nuclear medicine, environmental monitoring, and radiology for measuring the decay of radioactive material.
Curie (Ci)
Abbreviation: Ci
Conversion Factor: 37000000000.000000
Curie is a non SI unit of radioactivity, which is practically equivalent to 3.7 × 10¹⁰ decays per second. It was the basis of radioactivity of one gram of radium-226.
Applications: It was used historically in nuclear medicine and radiology though it has been replaced largely by the Becquerel.
Röntgen (R)
Symbol: R
Conversion Factor: 0.000258
Definition: The Röntgen measures the ionization of X-rays or gamma radiation in air, which states the exposure of radiation.
Applications: It was used historically in radiology and protection in measuring exposure, but nowadays it is replaced largely by the Gray and Sievert for more precise measurements.
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