The observation of intercombination lines 1s3p3P1→1s21S0of multicharged He-like ions in laser-produced plasmas

Бойко, В. А.; Faenov, A. Ya.; Pikuz, S. A.; Skobelev, I. Yu.; Виноградов, А. В.; Yukov, E A

doi:10.1088/0022-3700/10/17/013

Cited by 42 publications

(15 citation statements)

References 10 publications

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“…Boiko et al (1978bBoiko et al ( , 1979 have measured 13 for MgXIILa in a laser-produced plasma which contained only 1· 5 % Mg and was optically thin to Mg XII La, and have deduced values of N e , for distances out to ~ 200 11m from the target, which are in agreement with other measurements. On the assumption that the line P XV La is optically thin in a pure phosphorous laser-produced plasma, Boiko et al (1978bBoiko et al ( , 1979 have similarly deduced values of Ne which are in agreement with other measurements (see the further discussion in Section 4a below). These results appear to be the only confirmation of the optically thin calculations.…”

Section: (A) Optically Thin Casesupporting

confidence: 78%

“…As summarized in Section 2 below, recent measurements on laser-produced plasmas under optically thin conditions (Boiko et al 1978b(Boiko et al , 1979, when interpreted with the theory of Vinogradov et al (1977), give values of electron denSity in good agreement with other independent measurements, thereby lending support to the theory.…”

Section: Introductionsupporting

confidence: 71%

“…Hutcheon and McWhirter (1973) discussed the magnitude of 8 in qualitative terms, and concluded that any departure of 8 from the statistical value (due to collisioninduced transitions between the 28 and 2p states) would be slight. Vinogradov et al (1977) set up the appropriate quasi-steady state rate equations and presented calculations of 13 (= 8) for MgXIILa' Additional calculations were subsequently presented by Boiko et al (1978b) and Skobe1ev et al (1978, for MgXIILa-SXVIL". These results may be summarized as follows.…”

Section: (A) Optically Thin Casementioning

confidence: 99%

“…to Z2 (see e.g. Boiko et al 1978bBoiko et al , 1979, then (fA',; varies as Z3/2. This implies that 11, with values in the range 1-3, drops further below the optimum value (of (fAt) for anomalous fl values with increasing Z.…”

Section: (I) Model Calculationsmentioning

confidence: 99%

“…The intensity ratio of the fine-structure components of the hydrogen-like Lrx doublet ofthird sequence elements (sodium-argon) is currently of interest as a density diagnostic in high temperature plasmas, in density regimes which include laserproduced plasmas on the one hand and astrophysical and tokamak plasmas on the other (Vinogradov et al 1974(Vinogradov et al , 1977Boiko et al 1978bBoiko et al , 1979. As summarized in Section 2 below, recent measurements on laser-produced plasmas under optically thin conditions (Boiko et al 1978b(Boiko et al , 1979, when interpreted with the theory of Vinogradov et al (1977), give values of electron denSity in good agreement with other independent measurements, thereby lending support to the theory.…”

Section: Introductionmentioning

confidence: 99%

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An Interpretation of Anomalous Intensity Ratios Within the Hydrogen-like La Doublet in Optically Thick Laser-produced Plasmas

Irons¹

1980

Aust. J. Phys.

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It is shown that the anomalous intensity ratios of the fine-structure components of MgXIIL. and Al XIII L. observed in optically thick laser-produced plasmas can be explained in terms of the usual radiative and collisional processes provided aIIowance is made for the effect of differential motion on the plasma opacity. The Doppler effect associated with differential expansion causes the red component of the doublet in the peripheral plasma region to overlap the blue component in the central region, leading to preferential absorption of the blue component. Model calculations give intensity ratios in good agreement with experiment, and explain such details of the line profile structure as the so-caIIed short-wave satellite and a component spacing in excess of the theoretical optically thin value. This study further demonstrates the major role played by differential motion in shaping the emergent profile of an opticaIIy thick line from a laser-proouced plasma.

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Section: (A) Optically Thin Casesupporting

confidence: 78%

Section: Introductionsupporting

confidence: 71%

Section: (A) Optically Thin Casementioning

confidence: 99%

Section: (I) Model Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Interpretation of Anomalous Intensity Ratios Within the Hydrogen-like La Doublet in Optically Thick Laser-produced Plasmas

Irons¹

1980

Aust. J. Phys.

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X-ray Spectroscopy of High n Transitions of He- and Ne-Like Ions in Alcator C-Mod Plasmas

Rice

Fournier

Marmar

et al. 2005

Springer Series in Chemical Physics

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The Rydberg series (1s 2-1snp) up to n=14 of helium-like argon (Z=18) has been observed from Alcator C-Mod plasmas using a high resolution x-ray spectrometer array. High n satellites to these lines of the form 1s 2 2s-1s2snp and 1s 2 2p-1s2pnp with 3 ≤ n ≤ 12 have been recorded. X-ray spectra of 2l-nl transitions with 3 ≤ n ≤ 18 in molybdenum (Z=42) and 3 ≤ n ≤ 12 in krypton (Z=36) and niobium (Z=41) from charge states around neon-like have also been measured. Numerous examples of the configuration interaction, which alters the line intensities in some transitions of neon-like ions with nearly degenerate upper levels, have been observed. Accurate wavelengths of all of these transitions (± .5 mÅ) have been determined by comparison to neighboring reference lines from Hand He-like charge states. Line identifications have been made by comparison to ab initio atomic structure calculations, using a fully relativistic, parametric potential code. Measured line intensities have been compared with collisional radiative modeling that includes the contributions from dielectronic recombination and inner shell excitation rates, with good agreement.

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Collisional configuration-rearrangement in fast neon projectiles

et al. 1978

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The observation of intercombination lines 1s3p³P₁→1s²¹S₀of multicharged He-like ions in laser-produced plasmas

Cited by 42 publications

References 10 publications

An Interpretation of Anomalous Intensity Ratios Within the Hydrogen-like La Doublet in Optically Thick Laser-produced Plasmas

An Interpretation of Anomalous Intensity Ratios Within the Hydrogen-like La Doublet in Optically Thick Laser-produced Plasmas

X-ray Spectroscopy of High n Transitions of He- and Ne-Like Ions in Alcator C-Mod Plasmas

Collisional configuration-rearrangement in fast neon projectiles

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