| Zugriffsnummer | 35336 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | What are the correct L-subshell photoionization cross sections for quantitative X-ray spectroscopy? |
| Autor(in); Institution |
Hönicke, Philipp; 7.2, Kryophysik und Spektrometrie, PTB-Berlin
Kolbe, Michael; 7.1, Radiometrie mit Synchrotronstrahlung, PTB-Berlin
Beckhoff, Burkhard; 7.2, Kryophysik und Spektrometrie, PTB-Berlin
|
| Quelle/Jahr | X-Ray Spectrometry: 45 (2016), 4, 207 - 211 |
| ISSN | 0049-8246 (PRINT) ; 1097-4539 (ONLINE) |
| DOI | |
| Verlag | New York, NY: Wiley |
| Zusammenfassung | Abstract For fundamental parameter-based, quantitative X-ray fluorescence (XRF), X-ray photoelectron spectroscopy (XPS) or Auger electron spectroscopy (AES) it is crucial to accurately know the photoionization cross sections (PCS). This atomic probability to absorb the exciting photon and eject a photoelectron, in general followed by a subsequent decay resulting in the emission of a fluorescence photon or an Auger electron, strongly depends on the electron configuration and photon energy. Two contrary models for the photon energy dependence of the L-subshell PCS, or the 2s, 2p ½ and 2p 3/2 energy levels, respectively, exist in the literature and an experimental verification was not available until recently. In this work, the two models for calculating the PCS are discussed and their influence on quantitative experiments is demonstrated by means of the fluorescence production cross sections for the three L shells. Depending on the excitation conditions, These fluorescence production cross sections and, thus, the derived quantitative results can differ significantly if the wrong PCS model is employed. |
