![]() Alpha particles produce greater harm than do beta particles, gamma rays and X-rays for a given absorbed dose, so 1 Gy of alpha radiation is more harmful than 1 Gy of beta radiation. One gray is equivalent to 100 rads.Įqual doses of all types of ionizing radiation are not equally harmful to human tissue. Rad is the old and still used unit of absorbed dose. One gray dose is equivalent to one joule radiation energy absorbed per kilogram of organ or tissue weight. The absorbed dose is the amount of energy absorbed per unit weight of the organ or tissue and is expressed in units of gray (Gy). When ionizing radiation interacts with the human body, it gives its energy to the body tissues. What properties are considered when ionizing radiation is measured? The three kinds of radiation generated by radioactive materials or sources are alpha particles, beta particles and gamma-rays. Minerals such as uranium and thorium are radioactive and give off radiation when the nucleus breaks down or disintegrates. radiation from ingesting food and drinking water that may contain radioactive potassium-40.terrestrial radiation from minerals in the earth’s crust,.By comparison FM radio stations transmit at frequencies around 100 MHz (megahertz) or 0.1 Ghz (gigahertz). The frequency of this radiation is very high - 0.3 to 30 Ehz (exahertz or billion gigahertz). X-rays refer to a kind of electromagnetic radiation generated when a strong electron beam bombards metal inside a glass tube. Artificial sources of radiation include X-ray machines, radioactive isotopes used in nuclear medicine, gamma cameras, nuclear gauges and nuclear power plants. There are natural and artificial sources of ionizing radiation.
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