Satellite Lines in the EUV Spectrum of Foil-Excited Lithium

Blanke, J H; Hucke, R.; Heckmann, P. H.

doi:10.1088/0031-8949/31/2/006

Cited by 12 publications

(10 citation statements)

References 46 publications

(22 reference statements)

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“…The transition 2p2 'P-2p3d 'Do (at 1036A) within the doublyexcited system was also observed. Many emission lines in the region near the 141 A line were recently reported by Trabert et al [44]. Due to the high density of doubly-excited transitions predicted in this region (involving both singlets and triplets) it is, however, hard to firmly establish identifications in some cases.…”

Section: Lismentioning

confidence: 92%

“…The lifetime of the upper level has been determined experimentally to be 49 f 5ps by Berry et al [37] and to be 44 f 4ps by Trabert et al [44]. In this way a XUV laser could be obtained.…”

Section: The Metastable Ls2s2p 4p0 Statementioning

confidence: 97%

“…Very extensive calculations of energies of doubly-excited states of He-like systems for Z = 1-5 were also presented by Lipsky et al [25]. More references to theoretical work can be found elsewhere, see e.g., references given by Trabert et al [44].…”

Section: Lismentioning

confidence: 99%

“…Using the intercombination transition observed by Willison et al [98] and the experimental term energy of the lowest quartet [63], Mannervik and Cederquist [lo21 were able to establish absolute term energies for eight core-excited doublets with an accuracy of IOcm-' or better. These term energies were later used [lo31 in order to more unambiguously identify observations made by Trabert et al [44]. A term diagram is given in Fig.…”

Section: Core-excited Doubletsmentioning

confidence: 99%

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Optical studies of multiply excited states

Mannervik¹

1989

Phys. Scr.

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Optical studies of multiply-excited states are reviewed with emphasis on emission spectroscopy. From optical measurements, properties such as excitation energies, lifetimes and autoionization widths can be determined with high accuracy, which constitutes a challenge for modern computational methods. This article mainly covers work on two-, three- and four-electron systems, but also sodium-like quartet systems. Furthermore, some comments are given on bound multiply-excited states in negative ions. Fine structure effects on transition wavelengths and lifetimes (autoionization) are discussed. In particular, the most recent experimental and theoretical studies of multiply-excited states are covered. Some remaining problems, which require further attention, are discussed in more detail.

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Section: Lismentioning

confidence: 92%

“…The lifetime of the upper level has been determined experimentally to be 49 f 5ps by Berry et al [37] and to be 44 f 4ps by Trabert et al [44]. In this way a XUV laser could be obtained.…”

Section: The Metastable Ls2s2p 4p0 Statementioning

confidence: 97%

Section: Lismentioning

confidence: 99%

Section: Core-excited Doubletsmentioning

confidence: 99%

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Optical studies of multiply excited states

Mannervik¹

1989

Phys. Scr.

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“…Independent of the work of Mannervik and Cederquist [4] on the core-excited doublets, Trabert et al [9] have been studying the EUV spectrum of Li and they found a large number of lines never reported earlier. Their assignments of transitions from core-excited doublets were mainly based on available calculations.…”

Section: Introductionmentioning

confidence: 98%

On the EUV Spectrum of Li I

Mannervik¹,

Cederquist²

1986

Phys. Scr.

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Wavelength predictions for the 1s 22s-1s2s3p satellite transitions

Mazzoni¹

1986

Sol Phys

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The experimentally known energies of the ls22s--, ls2s(~S, 3S)3p transitions are considered for lithium to calcium. Their differences from the corresponding He-like resonances are fitted to the atomic number by means of a polynomial function and, through interpolation, the Wavelengths for nitrogen to sodium are calculated.An isoelectronic investigation, concerning satellite spectra, has been carried out along the lithium sequence.Although satellite lines due to jumping electrons with principal quantum number n > 2 are present in flare spectra, so far not much has appeared in the atomic literature, especially for the first and medium ions of the sequence. Recently, new laboratory data have become available for the case n = 3 in low-Z elements (Kennedy and Carroll, 1978; Jannitti etal., 1985a; Tr~ibert etaL, 1985). The energy trend of the transitions 1s22s 2 S ~ ls2s(tS)(3S)3p 2p has been examined in the range 3 < Z < 20: predictions are provided for the medium-Z ions, well obnserved during flares (Phillips et al., 1982;Doschek, 1972), but whose identifications are missing in the literature. Some uncertain attributions can be confirmed, although a few others should probably be revised.The term value in Rydberg units is given by T = (Z -S)2/n 2 where the parameter S accounts for the screening effect. Neglecting fine structure, the wavenumber a of a transition between orbitals n = 3 and n = 1 is then equal to

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Satellite Lines in the EUV Spectrum of Foil-Excited Lithium

Cited by 12 publications

References 46 publications

Optical studies of multiply excited states

Optical studies of multiply excited states

On the EUV Spectrum of Li I

Wavelength predictions for the 1s 22s-1s2s3p satellite transitions

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