Analyses of the Sn IX–Sn XII spectra in the EUV region

Churilov, S S; Ryabtsev, A. N.

doi:10.1088/0031-8949/73/6/014

Cited by 87 publications

(98 citation statements)

References 17 publications

(27 reference statements)

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“…The spectra reported in this article are relevant to the verification of the identifications of the EUV spectra of Sn ions [9,10] which are used as a "fuel" in the radiation sources for the projection lithography at the 135 Å wavelength. The previous analyses in [9,10] were performed without any isoelectronic or isoionic support.…”

Section: Discussionmentioning

confidence: 99%

“…The previous analyses in [9,10] were performed without any isoelectronic or isoionic support. The isoelectronic sequence Rh VIII-Cd XI was recently studied in [7].…”

Section: Discussionmentioning

confidence: 99%

“…The results for the palladium isonuclear spectra were recently published (see [8] and references therein). Such isoelectronic data are necessary for validation of previously reported analyses of the corresponding tin ion spectra [9,10]. Research on these spectra is also of general interest to atomic physics for improving of theoretical methods of calculations of multi-electron heavy atom spectra.…”

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Resonance Transitions in the Spectra of the Ag6+–Ag8+ Ions

Ryabtsev¹,

Kononov²

2017

Atoms

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Abstract:The spectrum of silver, excited in a vacuum spark, was recorded in the region 150-350 Å on a 3-m grazing incidence spectrograph. The resonance 4d k -(4d k−1 5p + 4d k−1 4f + 4p 5 4d k+1 ) was studied in the Ag 6+ -Ag 8+ spectra (Ag VII-Ag IX) with k = 5-3, respectively. Several hundred lines were identified with the aid of the Cowan code and orthogonal operator technique calculations. The energy levels were found and the transition probabilities were calculated.

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Section: Discussionmentioning

confidence: 99%

“…The previous analyses in [9,10] were performed without any isoelectronic or isoionic support. The isoelectronic sequence Rh VIII-Cd XI was recently studied in [7].…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Resonance Transitions in the Spectra of the Ag6+–Ag8+ Ions

Ryabtsev¹,

Kononov²

2017

Atoms

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“…The analyses of the UTA structure for tin and xenon are not discussed here because they have already been done in detail [6,18,19,20]. In this study, assignments of the strong discrete lines from tin and xenon ions, and the complicated broad features of tungsten ions have been performed with the help of comparisons with the previous experimental results, the experimental spectra in charge exchange collisions [21] and the theoretical calculations by Cowan code.…”

Section: Analysesmentioning

confidence: 99%

Measurement of EUV Spectra from High Z Elements in the Large Helical Device

Suzuki¹,

Katō²,

Sakaue³

et al. 2011

AIP Conference Proceedings

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Abstract. Extreme ultra-violet (EUV) emission spectra from highly charged tin, xenon and tungsten ions have been measured in optically thin high-temperature plasmas produced in the Large Helical Device (LHD) at the National Institute for Fusion Science by using a grazing incidence spectrometer and a tracer-encapsulated solid pellet (TESPEL) injector. Quasi-continuous spectral features arising from unresolved transition array (UTA) of open 4d subshell ions were commonly observed for tin, xenon and tungsten around 13.5, 11, and 5 nm, respectively, when edge plasma was cooled enough. The spectral appearance obviously depends on edge electron temperature and atomic number. In the case of intermediate edge temperature, sharp discrete lines from highly charged open 4s or 4p subshell ions are clearly observed for tin and xenon in longer wavelength side of the UTAs but not for tungsten. Assignments of the strong discrete lines have been performed with the help of comparisons with the other experimental data and the theoretical calculations by Cowan code. Contribution of open 4f subshell ions should also be considered to interpret the whole spectra from tungsten ions.

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“…Transitions of the type 4p 6 4d N+1 −4p 5 4d N+2 +4p 6 4d N 4f 1 in Sn 8+ -Sn 13+ merge to form an unresolved transition array (UTA) [3] which contains thousands of individual lines and emits strongly in such a plasma at an electron temperature of~30 eV in a narrow wavelength range around 13.5 nm [4,5]. This value coincides with the wavelength of peak reflectance of~70% of the Mo/Si multilayer mirrors (MLMs) that are used in the scanning tools [6] and tin plasmas are the brightest sources at this wavelength.…”

Section: Introductionmentioning

confidence: 99%

Configuration Interaction Effects in Unresolved 5p65dN+1−5p55dN+2+5p65dN5f1 Transition Arrays in Ions Z = 79–92

Liu

Kilbane

Dunne

et al. 2017

Atoms

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Configuration interaction (CI) effects can greatly influence the way in which extreme ultraviolet (EUV) and soft X-ray (SXR) spectra of heavier ions are dominated by emission from unresolved transition arrays (UTAs), the most intense of which originate from ∆n = 0, 4p 6 4d N+1 −4p 5 4d N+2 +4p 6 4d N 4f 1 transitions. Changing the principle quantum number n, from 4 to 5, changes the origin of the UTA from ∆n = 0, 4p 6 4d N+1 −4p 5 4d N+2 +4p 6 4d N 4f 1 to ∆n = 0, 5p 6 5d N+1 −5p 5 5d N+2 +5p 6 5d N 5f 1 transitions. This causes unexpected and significant changes in the impact of configuration interaction from that observed in the heavily studied n = 4−n = 4 arrays. In this study, the properties of n = 5−n = 5 arrays have been investigated theoretically with the aid of Hartree-Fock with configuration interaction (HFCI) calculations. In addition to predicting the wavelengths and spectral details of the anticipated features, the calculations show that the effects of configuration interaction are quite different for the two different families of ∆n = 0 transitions, a conclusion which is reinforced by comparison with experimental results.

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Analyses of the Sn IX–Sn XII spectra in the EUV region

Cited by 87 publications

References 17 publications

Resonance Transitions in the Spectra of the Ag6+–Ag8+ Ions

Resonance Transitions in the Spectra of the Ag6+–Ag8+ Ions

Measurement of EUV Spectra from High Z Elements in the Large Helical Device

Configuration Interaction Effects in Unresolved 5p65dN+1−5p55dN+2+5p65dN5f1 Transition Arrays in Ions Z = 79–92

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