X-ray notation of atomic orbitals ( English X-ray notation ) - a method of classification of atomic orbitals used in the study of x-ray radiation . This traditional technique is used in most x-ray spectroscopic methods, including Auger spectroscopy and X-ray photoelectron spectroscopy . Each main quantum number corresponds to a certain letter.
Content
Nomenclature
| Quantum numbers | Atomic nomenclature | X-ray nomenclature | |||
|---|---|---|---|---|---|
| n | l | s | j | ||
| one | 0 | Β± 1/2 | 1/2 | 1s (1/2) | K 1 |
| 2 | 0 | Β± 1/2 | 1/2 | 2s (1/2) | L 1 |
| 2 | one | -1/2 | 1/2 | 2p 1/2 | L 2 |
| 2 | one | +1/2 | 3/2 | 2p 3/2 | L 3 |
| 3 | 0 | Β± 1/2 | 1/2 | 3s | M 1 |
| 3 | one | -1/2 | 1/2 | 3p 1/2 | M 2 |
| 3 | one | +1/2 | 3/2 | 3p 3/2 | M 3 |
| 3 | 2 | -1/2 | 3/2 | 3d 3/2 | M 4 |
| 3 | 2 | +1/2 | 5/2 | 3d 5/2 | M 5 |
Application
- X-ray sources are classified by the type of material and orbital used to generate radiation. For example, Cu KΞ± radiation corresponds to X-ray radiation from the copper K orbital.
- The absorption of electromagnetic radiation is characterized by an orbital that absorbs an x-ray photon. In spectroscopy of an extended fine structure of X-ray absorption and X-ray magnetic circular dichroism L-threshold or L absorption threshold denote the point at which the L-orbital begins to absorb X-ray radiation.
- In Auger spectroscopy, peaks are identified by three orbital designations. For example, KL 1 L 2 . In this case, K denotes a vacancy that originally existed at the nuclear level, L 1 denotes the state of an electron that relaxes in a vacancy, L 2 denotes the orbital from which an electron is emitted.
See also
- Sigban notation for the classification of spectral lines used in x-ray analysis
Notes
- β Dr. Garrett's Class Notes Archived February 15, 2017 at Wayback Machine - page 12
- β IUPAC Table VIII.1 - page 5