Resonance radiation transfer in dense dispersive media

Sechin, A. Yu.; Starostin, A. N.; Zemtsov, Yu. K.; Chekhov, D. I.; Leonov, A. G.

doi:10.1016/s0022-4073(97)00095-2

Cited by 5 publications

(2 citation statements)

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“…The self-absorbed 396.15 nm resonant line exhibits a peak at its central wavelength. Such a feature has been already reported 24,27 in the case of sodium resonant transitions in a high pressure ͑0.7-2.9 bars͒ lamp discharge. However, the populating processes and spectral broadening mechanisms are strongly different from ours: the temperature is about 1000 K, the atomic density ranges from 10 24 to 10 25 m −3 , and the electron density from 10 21 to 10 22 m −3 .…”

Section: Introductionsupporting

confidence: 74%

Spectroscopic analysis of the excitation transfer from background air to diffusing aluminum laser produced plasma

Ribière

Karabourniotis

Chéron

2009

Journal of Applied Physics

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During the relaxation of the plasma plume generated by laser ablation of an aluminum target, a pronounced intensity enhancement is observed at the central wavelength of the 396.15 nm self-reversed resonant line. This spectral special feature is analyzed and related to the interaction of the plasma edge with the background air excited by the shockwave, prompt electrons, and extreme ultraviolet radiation produced at the earliest times of the ablation. In this article, the electron density, the aluminum ground state, and resonant level populations are determined from the fitting of the 396.15 nm calculated line profile to the experimental one at two background pressures (100 and 1000 Pa). The evolution of these densities is derived from experiments performed at delays, after the laser pulse arrival, ranging from 120 to 180 ns.

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Section: Introductionsupporting

confidence: 74%

Spectroscopic analysis of the excitation transfer from background air to diffusing aluminum laser produced plasma

Ribière

Karabourniotis

Chéron

2009

Journal of Applied Physics

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“…In the broad range of conditions in plasmas and gases, where the complete redistribution (CRD) in photon frequency within the resonance line shape is applicable, the radiative transfer is described by the Biberman-Holstein equation for the density of excited atoms [9,10] and characterized by the infinite mean-squared displacement of the initial perturbation [11] and, respectively, by the irreducibility of the integral equation, in space variables, to a differential one. This makes the respective radiative transfer a nonlocal (superdiffusive) one [12,13] (for the deviation from the CRD and the limits of its applicability see, e.g., [14][15][16]). …”

Section: Introductionmentioning

confidence: 99%