# Linear energy transfer

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The quotient of [math]dE[/math] by [math]dl[/math], where [math]dE[/math] is the mean energy lost by the charged particle due to electronic interactions in traversing a distance [math]dl[/math], thus:

[math] L = \frac{dE}{dl} [/math]

The unit of linear energy transfer is joule per metre J m^{-1}, often given in keV μm^{-1}.

See high linear energy transfer radiation and low linear energy transfer radiation.

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