Everything about The Siegbahn Notation totally explained
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.
| Low energy level |
High energy level |
Name of the line |
| K (1s) |
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.
| Siegbahn notation |
IUPAC notation |
| Kα1 |
K-L3 |
| Kα2 |
K-L2 |
| Kβ1 |
K-M3 |
| Lα1 |
L3-M5 |
| Lβ1 |
L2-M4 |
| Mα1 |
M5-N7 |
Further Information
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