Direct Observation of the M1 Transition between the Ground Term Fine Structure Levels of W VIII
We present a direct observation of the M1 transition between the fine structure splitting in the 4 f 13 5 s 2 5 p 6 2 F ground term of W VIII. The spectroscopic data of few-times ionized tungsten ions are important for the future ITER diagnostics, but there is a serious lack of data. The present study is part of an ongoing effort to solve this problem. Emission from the tungsten ions produced and trapped in a compact electron beam ion trap is observed with a Czerny–Turner visible spectrometer. Spectra in the EUV range are also observed at the same time to help identify the previously-unreported visible lines. The observed wavelength 574.47 ± 0.03 nm (air), which corresponds to the fine structure splitting of 17,402.5 ± 0.9 cm − 1 , shows reasonable agreement with the previously reported value 17,410 ± 5 cm − 1 obtained indirectly through the analysis of EUV spectra [Ryabtsev et al., Atoms 3 (2015) 273]..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2017 |
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| Erschienen: |
2017 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:5 |
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| Enthalten in: |
Atoms - 5(2017), 1, p 13 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Momoe Mita [VerfasserIn] |
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| Links: |
doi.org [kostenfrei] |
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| Themen: |
EBIT |
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| doi: |
10.3390/atoms5010013 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
DOAJ052646149 |
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| 520 | |a We present a direct observation of the M1 transition between the fine structure splitting in the 4 f 13 5 s 2 5 p 6 2 F ground term of W VIII. The spectroscopic data of few-times ionized tungsten ions are important for the future ITER diagnostics, but there is a serious lack of data. The present study is part of an ongoing effort to solve this problem. Emission from the tungsten ions produced and trapped in a compact electron beam ion trap is observed with a Czerny–Turner visible spectrometer. Spectra in the EUV range are also observed at the same time to help identify the previously-unreported visible lines. The observed wavelength 574.47 ± 0.03 nm (air), which corresponds to the fine structure splitting of 17,402.5 ± 0.9 cm − 1 , shows reasonable agreement with the previously reported value 17,410 ± 5 cm − 1 obtained indirectly through the analysis of EUV spectra [Ryabtsev et al., Atoms 3 (2015) 273]. | ||
| 650 | 4 | |a EBIT | |
| 650 | 4 | |a tungsten ions | |
| 650 | 4 | |a visible spectroscopy | |
| 650 | 4 | |a plasma diagnostics | |
| 653 | 0 | |a Nuclear and particle physics. Atomic energy. Radioactivity | |
| 700 | 0 | |a Hiroyuki A. Sakaue |e verfasserin |4 aut | |
| 700 | 0 | |a Daiji Kato |e verfasserin |4 aut | |
| 700 | 0 | |a Izumi Murakami |e verfasserin |4 aut | |
| 700 | 0 | |a Nobuyuki Nakamura |e verfasserin |4 aut | |
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