Difference between revisions of "Kerma"

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<math>
 
<math>
K = \frac{(dE_{tr})}{dm}
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K = \frac{dE_{tr}}{dm}
 
</math>
 
</math>
  
 
The SI unit of kerma is joule per kilogram (J kg<sup>-1</sup>), and its special name is [[gray]] (Gy).
 
The SI unit of kerma is joule per kilogram (J kg<sup>-1</sup>), and its special name is [[gray]] (Gy).
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 +
‘Kerma’ is an acronym for ‘kinetic energy released in a mass’.
  
 
[[ICRP Publication 116]], 2010
 
[[ICRP Publication 116]], 2010
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== Previous glossary entries ==
 
== Previous glossary entries ==
  
=== from [[ICRP Publication 131]], 2015 ===
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=== from [[ICRP Publication 103]], 2007; [[ICRP Publication 119]], 2012; [[ICRP Publication 120]], 2012; [[ICRP Publication 135]], 2017; and [[ICRP Publication 136]], 2011 ===
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The quotient of the sum of the kinetic energies, <math>dE_{tr}</math>, of all charged particles liberated by uncharged particles in a mass <math>dm</math> of material, and the mass <math>dm</math> of that material.
 +
 
 +
<math>
 +
K = \frac{dE_{tr}}{dm}
 +
</math>
 +
 
 +
Kerma is defined as a non-stochastic quantity and <math>dE_{tr}</math> is the expectation value of the sum of the kinetic energies. The unit for kerma is joule per kilogram (J kg<sup>-1</sup>) and its special name is [[gray]] (Gy).

Revision as of 17:10, 18 August 2021

Glossary Icon-2.png

Quantity for ionising uncharged particles, defined by the quotient of [math]dE_{tr}[/math] by [math]dm[/math], where [math]dE_{tr}[/math] is the mean sum of the initial kinetic energies of all the charged particles liberated in a mass [math]dm[/math] of a material by the uncharged particles incident on [math]dm[/math], thus:

[math] K = \frac{dE_{tr}}{dm} [/math]

The SI unit of kerma is joule per kilogram (J kg-1), and its special name is gray (Gy).

‘Kerma’ is an acronym for ‘kinetic energy released in a mass’.

ICRP Publication 116, 2010

Return to Glossary

Previous glossary entries

from ICRP Publication 103, 2007; ICRP Publication 119, 2012; ICRP Publication 120, 2012; ICRP Publication 135, 2017; and ICRP Publication 136, 2011

The quotient of the sum of the kinetic energies, [math]dE_{tr}[/math], of all charged particles liberated by uncharged particles in a mass [math]dm[/math] of material, and the mass [math]dm[/math] of that material.

[math] K = \frac{dE_{tr}}{dm} [/math]

Kerma is defined as a non-stochastic quantity and [math]dE_{tr}[/math] is the expectation value of the sum of the kinetic energies. The unit for kerma is joule per kilogram (J kg-1) and its special name is gray (Gy).