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Siegbahn notation
The Siegbahn notation is used in x-ray spectroscopy to name the spectral lines that are characteristic to elements. It was created by Manne Siegbahn.
The characteristic lines in x-ray emission spectra correspond to electronic transitions where an electron jumps down to an unfilled level in one of the inner shells of an atom. Such a hole in en inner shell may have been produced by bombardment with electrons in an x-ray tube, by other particles as in PIXE, by other x-rays in x-ray fluorescence or by radioactive decay of the atom's nucleus.
The table below show the correspondence between the name of a few lines and the electronic levels.
Siegbahn notation
| Low energy level |
High energy level |
Name of the line |
| K (1S0) |
L3 (²P3/2) |
Kα1 |
| L2 (²P1/2) |
Kα2 |
| M3 (³P3/2) |
Kβ1 |
| L3 (²P3/2) |
M5 (³D5/2) |
Lα1 |
| L2 (²P1/2) |
M4 (³D3/2) |
Lβ1 |
| M5 (³D5/2) |
N7 (5P3/2) |
Mα1 |
This notation is widely used in spectroscopy, but the IUPAC (International union of pure and applied chemistry) recommends another notation.
Correspondence between the IUPAC Siegbahn notations
| Siegbahn notation |
IUPAC notation |
| Kα1 |
K-L3 |
| Kα2 |
K-L2 |
| Kβ1 |
K-M3 |
| Lα1 |
L3-M5 |
| Lβ1 |
L2-M4 |
| Mα1 |
M5-N7 |
References
- Nomenclature system for x-ray spectroscopy (1991) IUPAC.
See also
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Siegbahn_notation". A list of authors is available in Wikipedia.
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