An absorption edge, absorption discontinuity or absorption limit is a sharp discontinuity in the absorption spectrum of a substance. These discontinuities occur at wavelengths where the energy of an absorbed photon corresponds to an electronic transition or ionization potential. When the quantum energy of the incident radiation becomes smaller than the work required to eject an electron from one or other quantum states in the constituent absorbing atom, the incident radiation ceases to be absorbed by that state. For example, incident radiation on an atom of a wavelength that has a corresponding energy just below the binding energy of the K-shell electron in that atom cannot eject the K-shell electron.
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| - حافة امتصاص (ar)
- Absorptionskante (de)
- Absorption edge (en)
- Край полосы поглощения (ru)
- 吸收限 (zh)
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| - حافة امتصاص (بالإنجليزي: Absorption edge) هي انقطاع حاد في امتصاص طيف الأشعة السينية بواسطة عنصر عندما طاقة الفوتون تتناسب مع طاقة غلاف الذرة ، تستخدم حافة الامتصاص في البلورات البروتينية لتصحيح اختلاف الطور الناتج عن تشتت شاذ متعدد في الطول الموجي. (ar)
- Als Absorptionskante wird allgemein ein sprunghafter Übergang von schwacher zu stärkerer Absorption bezeichnet, der an einer bestimmten Stelle eines elektromagnetischen Spektrums auftritt. (de)
- Край полосы поглощения (англ. absorption edge) — значение энергии кванта электромагнитного излучения, при превышении которого наблюдается резкое увеличение поглощения излучения веществом. (ru)
- 吸收限(absorption edge)是指物質對電磁波的吸收量隨著輻射頻率的不連續變化，當輻射頻率增加至某一限度時吸收量會驟然變大，而這個限度稱作吸收限。吸收限的大小與原子中電子占有的能級有關。 (zh)
- An absorption edge, absorption discontinuity or absorption limit is a sharp discontinuity in the absorption spectrum of a substance. These discontinuities occur at wavelengths where the energy of an absorbed photon corresponds to an electronic transition or ionization potential. When the quantum energy of the incident radiation becomes smaller than the work required to eject an electron from one or other quantum states in the constituent absorbing atom, the incident radiation ceases to be absorbed by that state. For example, incident radiation on an atom of a wavelength that has a corresponding energy just below the binding energy of the K-shell electron in that atom cannot eject the K-shell electron. (en)
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| - حافة امتصاص (بالإنجليزي: Absorption edge) هي انقطاع حاد في امتصاص طيف الأشعة السينية بواسطة عنصر عندما طاقة الفوتون تتناسب مع طاقة غلاف الذرة ، تستخدم حافة الامتصاص في البلورات البروتينية لتصحيح اختلاف الطور الناتج عن تشتت شاذ متعدد في الطول الموجي. (ar)
- Als Absorptionskante wird allgemein ein sprunghafter Übergang von schwacher zu stärkerer Absorption bezeichnet, der an einer bestimmten Stelle eines elektromagnetischen Spektrums auftritt. (de)
- An absorption edge, absorption discontinuity or absorption limit is a sharp discontinuity in the absorption spectrum of a substance. These discontinuities occur at wavelengths where the energy of an absorbed photon corresponds to an electronic transition or ionization potential. When the quantum energy of the incident radiation becomes smaller than the work required to eject an electron from one or other quantum states in the constituent absorbing atom, the incident radiation ceases to be absorbed by that state. For example, incident radiation on an atom of a wavelength that has a corresponding energy just below the binding energy of the K-shell electron in that atom cannot eject the K-shell electron. Siegbahn notation is used for notating absorption edges. In compound semiconductors, the bonding between atoms of different species forms a set of dipoles. These dipoles can absorb energy from an electromagnetic field, achieving a maximum coupling to the radiation when the frequency of the radiation equals a vibrational mode of the dipole. When this happens, the absorption coefficient gets a peak yielding the fundamental edge. This occurs in the far infrared region of the spectrum. (en)
- Край полосы поглощения (англ. absorption edge) — значение энергии кванта электромагнитного излучения, при превышении которого наблюдается резкое увеличение поглощения излучения веществом. (ru)
- 吸收限(absorption edge)是指物質對電磁波的吸收量隨著輻射頻率的不連續變化，當輻射頻率增加至某一限度時吸收量會驟然變大，而這個限度稱作吸收限。吸收限的大小與原子中電子占有的能級有關。 (zh)
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