Double L₃M ionization of Pd induced by impact with medium-energy electrons
- Cao, Wei Department of Physics, University of Fribourg, Switzerland
- Dousse, Jean-Claude Department of Physics, University of Fribourg, Switzerland
- Hoszowska, Joanna Department of Physics, University of Fribourg, Switzerland
- Kavčič, Matjaz J. Stefan Institute, Ljubljana, Slovenia
- Kayser, Yves Department of Physics, University of Fribourg, Switzerland
- Schenker, Jean-Luc Department of Physics, University of Fribourg, Switzerland
- Žitnik, M. J. Stefan Institute, Ljubljana, Slovenia
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14.02.2011
Published in:
- Physical Review A: atomic, molecular and optical physics. - 2011, vol. 83, no. 2, p. 022708
English
The electron-induced L₃M two-step double ionization cross sections of metallic Pd were determined experimentally for incident electron beam energies ranging from the double ionization threshold up to 18 keV. The double L₃M ionization cross sections were derived from the intensity ratios (ILαM:ILα) of the resolved M satellites to the parent diagram lines. The sample was bombarded with monoenergetic electrons from an energy-tunable 20-kV electron gun. The diagram and M-satellite x-ray lines were measured by means of high-resolution x-ray spectroscopy, using a reflection-type von Hamos bent crystal spectrometer. The two-step partial cross sections were determined by subtracting from the measured total double ionization cross sections the contributions due to the shake process and L₁-L₃M4,5 Coster-Kronig transitions. Despite the thick target employed in the present study, the dependence of the two-step cross sections on the incoming electron energy could be derived using a target slice decomposition method. It is shown that the obtained energy dependence can be well reproduced by the semiempirical parametrization model of Pattard and Rost.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 22339
- DOI 10.1103/PhysRevA.83.022708
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301883
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