Experimental determination of line energies, line widths and relative transition probabilities of the Gadolinium L x-ray emission spectrum
| Autor: | Ina Holfelder, Burkhard Beckhoff, Philipp Hönicke, Malte Wansleben, Rainer Unterumsberger, Yves Kayser, André Wählisch |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Photon Spectrometer Atomic Physics (physics.atom-ph) Gadolinium General Engineering FOS: Physical sciences chemistry.chemical_element Synchrotron radiation Context (language use) 01 natural sciences Physics - Atomic Physics 010309 optics Beamline chemistry 0103 physical sciences Emission spectrum Atomic physics 010306 general physics Line (formation) |
| Zdroj: | Metrologia. 56:065007 |
| ISSN: | 1681-7575 0026-1394 |
| Popis: | In this work the complete L-emission spectrum of gadolinium with respect to line energies, natural line widths, and relative transition probabilities was investigated using monochromatized synchrotron radiation. The measurements were realized in the PTB laboratory at BESSY II by means of an in-house built von Hamos spectrometer based on up to two full-cylinder HAPG mosaic crystal. The von Hamos spectrometer is calibrated by means of elastically scattered photons from the employed synchrotron radiation beamline leading to a well-defined energy scale and an experimentally determined spectrometer response. A selective excitation of the gadolinium L subshells was carried out to ensure a robust deconvolution of neighboring emission lines of different L subshells. The experimental results are discussed in the context of existing data from common databases and published values since significant deviations, especially for the L$\gamma_2$ and L$\gamma_3$ emission lines, are observed. We further substantiate and discuss two satellite lines at the low-energy side of the L$\beta_{2,15}$ and L$\gamma_1$ emission lines arising from the N$_{4,5}$ subshell. |
| Databáze: | OpenAIRE |
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