Resonant electron impact excitation of highly charged Fe ions studied with a compact electron beam ion trap

We present extreme ultraviolet spectra of 3s3p–3s3d transitions in Fe14+ observed with a compact electron beam ion trap. The contributions of indirect excitation via a metastable state and resonant excitation are studied by observing the electron energy dependence of the spectra for the energy range...

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Bibliographic Details
Published in:	X-ray spectrometry Vol. 49; no. 4; pp. 511 - 514
Main Authors:	Monobe, Masashi, Sakaue, Hiroyuki A., Kato, Daiji, Murakami, Izumi, Hara, Hirohisa, Watanabe, Tetsuya, Nakamura, Nobuyuki
Format:	Journal Article
Language:	English
Published:	Chichester, UK John Wiley & Sons, Inc 01-07-2020 Wiley Subscription Services, Inc
Subjects:	electron beam ion trap Electron beams Electron energy Electron impact excitation Electrons Excitation extreme ultraviolet spectra highly charged iron ions indirect excitation Ions Metastable state Qualitative analysis resonant excitation Ultraviolet spectra
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Summary:	We present extreme ultraviolet spectra of 3s3p–3s3d transitions in Fe14+ observed with a compact electron beam ion trap. The contributions of indirect excitation via a metastable state and resonant excitation are studied by observing the electron energy dependence of the spectra for the energy range of 60–210 eV. The results indicate that the 3s3d 1D2 level is directly excited from the 3s2 ground state whereas the 3s3d 3D3 level has a large contribution of the indirect excitation via the 3s3p 3P2 metastable state. Comparisons with the theoretical excitation cross sections including MNn resonant excitations show good qualitative agreement with the experimental results for the electron energy dependent features.
ISSN:	0049-8246 1097-4539
DOI:	10.1002/xrs.3148