Difference between revisions of "Linear attenuation coefficient"
From Online Dictionary of Crystallography
BrianMcMahon (talk | contribs) (Created page with "== Definition == The linear attenuation coefficient <math>\mu(E)</math>, or preferably <math>\mu_{TOT}(E)</math> in cm<sup>-1</sup>, is a measure of the photon beam attenuation ...") |
BrianMcMahon (talk | contribs) (Added German and Spanish translations (U. Mueller)) |
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| + | <font color="red">Absorptionskoeffizient, linearer Schwächungskoeffizient</font> (''Ge''). <font color="green">Coeficiente de atenuación lineal</font> (''Sp''). | ||
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== Definition == | == Definition == | ||
| − | The linear attenuation coefficient <math>\mu(E)</math>, or preferably <math>\mu_{TOT}(E)</math> in cm<sup> | + | The linear attenuation coefficient <math>\mu(E)</math>, or preferably <math>\mu_{TOT}(E)</math> in cm<sup>−1</sup>, is a measure of the photon beam attenuation by a material due to absorption and scattering processes and hence differs from the [[absorption coefficient]], which is a measure of beam attenuation due to absorption processes only. |
<math>\mu_{TOT}(E)</math> is given by | <math>\mu_{TOT}(E)</math> is given by | ||
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<math>\mu_{tot} = \Big[{\mu\over\rho}\Big]_{TOT}\rho</math> | <math>\mu_{tot} = \Big[{\mu\over\rho}\Big]_{TOT}\rho</math> | ||
| − | where <math>\rho</math> is the density of the material in g | + | where <math>\rho</math> is the density of the material in g cm<sup>−3</sup>. |
== History == | == History == | ||
| − | Coefficients for converting between these units are given by many authors [Cohen, E. R. | + | Coefficients for converting between these units are given by many authors [Cohen, E. R. and Taylor, B. N. (1987). ''Rev. Mod. Phys.'' '''59''', 1121-1148; Creagh, D. C. and McAuley, W. J. (1992). ''International Tables for Crystallography, Volume C'', ed. A. J. C. Wilson, Dordrecht: Kluwer; Chantler, C. T. (1995). ''J. Phys. Chem. Ref. Data'' '''24''', 71-643]. |
== See also == | == See also == | ||
Latest revision as of 18:07, 14 November 2017
Absorptionskoeffizient, linearer Schwächungskoeffizient (Ge). Coeficiente de atenuación lineal (Sp).
Definition
The linear attenuation coefficient [math]\mu(E)[/math], or preferably [math]\mu_{TOT}(E)[/math] in cm−1, is a measure of the photon beam attenuation by a material due to absorption and scattering processes and hence differs from the absorption coefficient, which is a measure of beam attenuation due to absorption processes only.
[math]\mu_{TOT}(E)[/math] is given by
[math]\mu_{tot} = \Big[{\mu\over\rho}\Big]_{TOT}\rho[/math]
where [math]\rho[/math] is the density of the material in g cm−3.
History
Coefficients for converting between these units are given by many authors [Cohen, E. R. and Taylor, B. N. (1987). Rev. Mod. Phys. 59, 1121-1148; Creagh, D. C. and McAuley, W. J. (1992). International Tables for Crystallography, Volume C, ed. A. J. C. Wilson, Dordrecht: Kluwer; Chantler, C. T. (1995). J. Phys. Chem. Ref. Data 24, 71-643].