2s photoionization and subsequent Auger cascade in atomic Si
(2010) In Physical Review A (Atomic, Molecular and Optical Physics) 81(6).- Abstract
- The 2s photoionization and subsequent Auger transition cascade in atomic Si were studied by means of synchrotron-radiation-induced electron spectroscopy. After the 2s photoionization, the core hole states decay predominantly by a two-step Auger transition cascade into the triply ionized [Ne]nl states. The ionization channels of the 2s core-ionized Si+ atoms to Si3+ ions were observed by measuring the conventional Auger electron spectra of the L-1-L2,3M Coster-Kronig transitions and the L2,3M-MMM Auger transitions. The observed L-1-L2,3M and L2,3M-MMM Auger spectra were analyzed by means of extensive multiconfiguration Dirac-Fock computations. We found that the electron correlation plays a prominent role in the Auger cascade, especially for... (More)
- The 2s photoionization and subsequent Auger transition cascade in atomic Si were studied by means of synchrotron-radiation-induced electron spectroscopy. After the 2s photoionization, the core hole states decay predominantly by a two-step Auger transition cascade into the triply ionized [Ne]nl states. The ionization channels of the 2s core-ionized Si+ atoms to Si3+ ions were observed by measuring the conventional Auger electron spectra of the L-1-L2,3M Coster-Kronig transitions and the L2,3M-MMM Auger transitions. The observed L-1-L2,3M and L2,3M-MMM Auger spectra were analyzed by means of extensive multiconfiguration Dirac-Fock computations. We found that the electron correlation plays a prominent role in the Auger cascade, especially for the final-step Auger L2,3M-MMM spectrum. Additionally, it was seen that the L2,3M-MMM Auger spectrum of Si includes more Auger groups than the isoelectronic L-2,L-3-MMAuger spectrum of Al. Thus, more information on the intermediate ionic states is obtained if they are produced by Auger cascade rather than by direct photoionization. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1628727
- author
- Partanen, L. ; Fritzsche, S. ; Jankala, K. ; Huttula, M. ; Urpelainen, Samuli LU ; Osmekhin, S. ; Aksela, H. and Aksela, S.
- organization
- publishing date
- 2010
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review A (Atomic, Molecular and Optical Physics)
- volume
- 81
- issue
- 6
- publisher
- American Physical Society
- external identifiers
-
- wos:000279262000003
- scopus:77954189101
- ISSN
- 1050-2947
- DOI
- 10.1103/PhysRevA.81.062513
- language
- English
- LU publication?
- yes
- id
- 4e9daf40-fd9a-4305-8157-0325c82df956 (old id 1628727)
- date added to LUP
- 2016-04-01 10:58:30
- date last changed
- 2022-01-26 04:20:14
@article{4e9daf40-fd9a-4305-8157-0325c82df956,
abstract = {{The 2s photoionization and subsequent Auger transition cascade in atomic Si were studied by means of synchrotron-radiation-induced electron spectroscopy. After the 2s photoionization, the core hole states decay predominantly by a two-step Auger transition cascade into the triply ionized [Ne]nl states. The ionization channels of the 2s core-ionized Si+ atoms to Si3+ ions were observed by measuring the conventional Auger electron spectra of the L-1-L2,3M Coster-Kronig transitions and the L2,3M-MMM Auger transitions. The observed L-1-L2,3M and L2,3M-MMM Auger spectra were analyzed by means of extensive multiconfiguration Dirac-Fock computations. We found that the electron correlation plays a prominent role in the Auger cascade, especially for the final-step Auger L2,3M-MMM spectrum. Additionally, it was seen that the L2,3M-MMM Auger spectrum of Si includes more Auger groups than the isoelectronic L-2,L-3-MMAuger spectrum of Al. Thus, more information on the intermediate ionic states is obtained if they are produced by Auger cascade rather than by direct photoionization.}},
author = {{Partanen, L. and Fritzsche, S. and Jankala, K. and Huttula, M. and Urpelainen, Samuli and Osmekhin, S. and Aksela, H. and Aksela, S.}},
issn = {{1050-2947}},
language = {{eng}},
number = {{6}},
publisher = {{American Physical Society}},
series = {{Physical Review A (Atomic, Molecular and Optical Physics)}},
title = {{2s photoionization and subsequent Auger cascade in atomic Si}},
url = {{http://dx.doi.org/10.1103/PhysRevA.81.062513}},
doi = {{10.1103/PhysRevA.81.062513}},
volume = {{81}},
year = {{2010}},
}