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The absorbed and exposition doze. Power of a doze. Units of measure

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The basic value, which describes action of ionizing radiation on substance, is energy of the radiation is absorbed by unit of mass of the substance during time of an irradiation. This value is named a doze of radiation or the absorbed doze of radiation Da.

Exposition doze or doze of an irradiation D0 is determined by ionizing action of radiation in air. 1 Roentgen is unit of doze. It is a doze such x-rays or γ – radiations, which forms in round, figures two billion pairs ions, after full ionization of 1 sm3 of clean dry air at the temperature 00 C and normal atmosphere pressure.

Power of a doze of radiation is determined action of radiation on the object. Power of doze of the radiation is measured by a doze of radiation, which object receive in time unit. We can determine power of doze as relation a doze ΔD of radiation to interval Δt.

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Power units of a doze of radiation are: for the absorbed doze the-watt on kg (W/kg), for an exposition doze - ampere on kg (A/kg) and Roentgen/hour (R/h) or micro Roentgen in a second (mkR/sec).

Device for measurement of capacity of a doze x-ray and scale - radiations is called dosimeter.


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