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| | Hello, I'm Kayleigh, a 23 year old from Warren, United States.<br>My hobbies include (but are not limited to) LARPing, Knapping and watching NCIS.<br><br>Here is my weblog [http://whats-Left.org.uk/bella/ Fifa 15 Coin Generator] |
| In [[physics]], the '''attenuation length''' or '''absorption length''' is the [[distance]] <math>\lambda</math> into a material when the [[probability]] has dropped to <math>1/e</math> that a [[Elementary particle|particle]] has ''not'' been [[Absorption (electromagnetic radiation)|absorbed]]. Alternatively, if there is a beam of particles incident on the material, the attenuation length is the distance where the [[intensity (physics)|intensity]] of the beam has dropped to <math>1/e</math>, or about 63% of the particles have been stopped.
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| Mathematically, the probability of finding a particle at depth ''x'' into the material is calculated by [[Beer-Lambert law]]:
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| :<math>P(x) = e^{-x /\lambda} \!\,</math>.
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| In general <math>\lambda</math> is material and energy dependent.
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| ==See also==
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| * [[Beer's Law]]
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| * [[Mean free path]]
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| * [[Attenuation coefficient]]
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| * [[Attenuation (electromagnetic radiation)]]
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| * [[Radiation length]]
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| ==References==
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| * S. Eidelman ''et al.'' [Particle Data Group], ''Review of particle physics'', Phys. Lett. B '''592''' (2004) (http://pdg.lbl.gov/)
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| * http://www.ct.infn.it/~rivel/Glossario/node2.html
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| ==External links==
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| * http://henke.lbl.gov/optical_constants/atten2.html
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| [[Category:Particle physics]]
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| [[Category:Experimental particle physics]]
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| {{particle-stub}}
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Latest revision as of 10:18, 13 May 2014
Hello, I'm Kayleigh, a 23 year old from Warren, United States.
My hobbies include (but are not limited to) LARPing, Knapping and watching NCIS.
Here is my weblog Fifa 15 Coin Generator