Difference between revisions of "Absorption edge"
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(<Font color="blue">Discontinuité, arête d'absorption</Font> (''Fr''). <Font color="red"> Absorptionskante </Font> (''Ge''). <Font color="green">Canto de absorción</Font> (''Sp''). <Font color="purple">край поглощения</Font> (''Ru''). <Font color="black">Spigolo di assorbimento </Font>(''It'') | (<Font color="blue">Discontinuité, arête d'absorption</Font> (''Fr''). <Font color="red"> Absorptionskante </Font> (''Ge''). <Font color="green">Canto de absorción</Font> (''Sp''). <Font color="purple">край поглощения</Font> (''Ru''). <Font color="black">Spigolo di assorbimento </Font>(''It'') | ||
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== Definition == | == Definition == | ||
An absorption edge is a sharp discontinuity in the absorption spectrum of X-rays by an element that occurs when the energy of the photon corresponds to the energy of a shell of the atom (''K'', ''L<sub>I</sub>'', ''L<sub>II</sub>'', ''L<sub>III</sub>'', etc.). | An absorption edge is a sharp discontinuity in the absorption spectrum of X-rays by an element that occurs when the energy of the photon corresponds to the energy of a shell of the atom (''K'', ''L<sub>I</sub>'', ''L<sub>II</sub>'', ''L<sub>III</sub>'', etc.). | ||
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== Examples == | == Examples == | ||
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For gallium: | For gallium: | ||
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<math>\lambda_{K}</math> = 1.1958 Ǻ; <math>\lambda_{L_{I}}</math> = 9.5446 Ǻ; <math>\lambda_{L_{II}}</math> = 10.8414 Ǻ; <math>\lambda_{L_{III}}</math>= 11.1038 Ǻ; | <math>\lambda_{K}</math> = 1.1958 Ǻ; <math>\lambda_{L_{I}}</math> = 9.5446 Ǻ; <math>\lambda_{L_{II}}</math> = 10.8414 Ǻ; <math>\lambda_{L_{III}}</math>= 11.1038 Ǻ; | ||
For arsenic: | For arsenic: | ||
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<math>\lambda_{K}</math> = 1.0448 Ǻ; <math>\lambda_{L_{I}}</math> = 8.1195 Ǻ; <math>\lambda_{L_{II}}</math> = 9.1187 Ǻ; <math>\lambda_{L_{III}}</math>= 9.3617 Ǻ; | <math>\lambda_{K}</math> = 1.0448 Ǻ; <math>\lambda_{L_{I}}</math> = 8.1195 Ǻ; <math>\lambda_{L_{II}}</math> = 9.1187 Ǻ; <math>\lambda_{L_{III}}</math>= 9.3617 Ǻ; | ||
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== See also == | == See also == | ||
Section 4.2.3 of ''International Tables of Crystallography, Volume C'' | Section 4.2.3 of ''International Tables of Crystallography, Volume C'' | ||
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[[Category:X-rays]]<br> | [[Category:X-rays]]<br> | ||
Revision as of 15:20, 3 February 2012
(Discontinuité, arête d'absorption (Fr). Absorptionskante (Ge). Canto de absorción (Sp). край поглощения (Ru). Spigolo di assorbimento (It)
Definition
An absorption edge is a sharp discontinuity in the absorption spectrum of X-rays by an element that occurs when the energy of the photon corresponds to the energy of a shell of the atom (K, LI, LII, LIII, etc.).
Examples
For gallium: [math]\lambda_{K}[/math] = 1.1958 Ǻ; [math]\lambda_{L_{I}}[/math] = 9.5446 Ǻ; [math]\lambda_{L_{II}}[/math] = 10.8414 Ǻ; [math]\lambda_{L_{III}}[/math]= 11.1038 Ǻ;
For arsenic: [math]\lambda_{K}[/math] = 1.0448 Ǻ; [math]\lambda_{L_{I}}[/math] = 8.1195 Ǻ; [math]\lambda_{L_{II}}[/math] = 9.1187 Ǻ; [math]\lambda_{L_{III}}[/math]= 9.3617 Ǻ;
See also
Section 4.2.3 of International Tables of Crystallography, Volume C