Asymmetry of Stark-broadened Lyman lines from laser-produced plasmas

Joyce, Robert; Woltz, L. A.; Hooper, C. F.

doi:10.1103/physreva.35.2228

Cited by 30 publications

(17 citation statements)

References 7 publications

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“…In order to proceed with the calculation, we introduce (similarly as in [7,10,21]) the simplifying approximarion ~d 5 G W(E, G)P(co, E, G)= W(E)P(co, E, <G>E), (15) which is exact to linear order in <G)E rio]. Making use of the tracelessness and the symmetry of tensors E u and Qu, in the coordinate system xyz with Eg0z, the term describing the emitter-ion quadrupole interaction Hq in the Hamiltonian (1) can be expressed in terms of the mean field gradients…”

Section: ( Aba'b" mentioning

confidence: 99%

“…For calculations of the line profiles, the constrained averages of the field gradients (Eij)E are useful ( [7], see also [10,21]). They are defined by…”

Section: E = -D-a ~ Qjr~ Exp ( -Rjd)mentioning

confidence: 99%

“…Fine structure splitting is an additional source of asymmetry [10], which in the case of line profiles of H-line NeX is of opposite sign and of the same order of magnitude as the asymmetry resulting from emitter-ion-quadrupole interaction (EIQI) and the static quadratic Stark effect. However, due to its very strong dependence on the radiator nuclear charge, this source of asymmetry is negligibly small for H-atoms.…”

Section: Introductionmentioning

confidence: 98%

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Asymmetry of hydrogen lines in plasmas utilizing a statistical description of ion-quadruple interaction in Mozer-Baranger limit

Halenka

1990

Z Phys D - Atoms, Molecules and Clusters

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Section: ( Aba'b" mentioning

confidence: 99%

“…For calculations of the line profiles, the constrained averages of the field gradients (Eij)E are useful ( [7], see also [10,21]). They are defined by…”

Section: E = -D-a ~ Qjr~ Exp ( -Rjd)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Asymmetry of hydrogen lines in plasmas utilizing a statistical description of ion-quadruple interaction in Mozer-Baranger limit

Halenka

1990

Z Phys D - Atoms, Molecules and Clusters

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“…(19) where the first two coefficients are given by C, =(6), and C2 = (6 ), - (6),. If we retain only the Ci term as an approximation, this gives Here Q (e) should not be confused with the components of the quadrupole tensor Q; .…”

Section: The Ion-quadrupole Effectmentioning

confidence: 99%

“…This is expressed by the use of Eq. (6) in Eq. (3) to give -M(co) ],, ', (10) where co& is the lower state energy of the radiator; a and a' denote upper states.…”

Section: Introductionmentioning

confidence: 99%

Ion broadening of dense-plasma spectral lines including field-dependent atomic physics and the ion quadrupole interaction

1993

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We examine the theoretical line spectra from hydrogenlike argon in the electron-number-density range of 10 -10 cm and at a temperature corresponding to kT=800 eV. At these high densities it is important to address the relevance of higher-order plasma-ion microfield efFects on the spectral line shape. We begin by calculating spectral line shapes using electric-field-dependent matrix elements that are constructed from wave functions which are solutions of Schrodinger's equation for hydrogenic ions in a uniform field. This provides a suitable basis for including microfield spatial nonuniformities by considering the quadrupole term in the radiator-perturbing ion interaction. Field gradients are calculated in an approximation that takes ion-ion correlations into account. We examine the consequences of these effects as well as of mixing between the adjacent Stark manifold on the Lyman-a and Lyman-P lines of hydrogenlike argon. PACS number(s): 52.25.Nr, 32.70.Jz, 32.30.Rj (APEX) model of the plasma-ion microfield [15,16] thus also incorporating correlations among perturbing ions. This represents an improvement with respect to a previous treatment that only included correlations between the radiator and perturbing ions [6].The power emitted by dipole radiation from an emitter immersed in a plasma, as a function of the frequency, is given by [1,17]

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Contribution to Calculation of Ion Microfield Nonuniformity Effect on the Asymmetry of Lyman‐α Line in Dense Plasma

Chenini

Khelfaoui

Guerricha

et al. 2011

Contrib. Plasma Phys.

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The high orders of Stark effects on spectral line shapes are examined in the ion-static and electron-impact approximations. At first the distribution functions of the spatial derivative of the ion microfield in He + plasma are calculated for different plasma conditions when the coupling parameter is weak. We present new results about the spatial derivative ion microfield distributions and apply them to show the asymmetry of the Lyman-α(Ly-α) line in He + plasma. At the second stage we show that asymmetry is affected by the spatial derivative tensor of the local ion electric field. We have used the Monte-Carlo simulation (MCS) to compute the distribution functions for all tensor components and use them to solve the evolution equation of emitter whose solution serves to compute and therefore to show the line shape asymmetry. Good agreement of our distribution functions of ion microfield gradients and the line asymmetry with other results are obtained.

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Asymmetry of Stark-broadened Lyman lines from laser-produced plasmas

Cited by 30 publications

References 7 publications

Asymmetry of hydrogen lines in plasmas utilizing a statistical description of ion-quadruple interaction in Mozer-Baranger limit

Asymmetry of hydrogen lines in plasmas utilizing a statistical description of ion-quadruple interaction in Mozer-Baranger limit

Ion broadening of dense-plasma spectral lines including field-dependent atomic physics and the ion quadrupole interaction

Contribution to Calculation of Ion Microfield Nonuniformity Effect on the Asymmetry of Lyman‐α Line in Dense Plasma

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