Density and Nonideality Effects in Plasmas

Lankin, A. V.; Norman, G. É.

doi:10.1002/ctpp.200910084

Cited by 26 publications

(13 citation statements)

References 43 publications

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“…As it is seen from Fig. 6 the experimental results agree with estimations [27] of energy interval ΔE without bound levels for the experimental values of the ion charge Z = 4.5 and N e = 5x10 23 cm −3 . The suppression observed in [26] is a density effect since T e = 190 eV which gives Γ ≈ 0.1.…”

Section: +14supporting

confidence: 89%

“…Recently it has been observed in a fs-laser produced plasma [26]. Theoretical consideration has been done in [26,27]. 6 Typical H-like carbon spectra [26] observed with 8 ns and sub-10-fs pulses.…”

Section: +14mentioning

confidence: 98%

“…Therefore the approach developed in [27] can also be applied to the interpretation of the spectral line suppression. As it is seen from Fig.…”

Section: +14mentioning

confidence: 99%

“…6 Typical H-like carbon spectra [26] observed with 8 ns and sub-10-fs pulses. The estimations [27] of density of states are given by black lines.…”

Section: +14mentioning

confidence: 99%

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Excited States of Warm Dense Matter

Norman

Skobelev

Stegaĭlov

2011

Contrib. Plasma Phys.

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The excited states of the warm dense matter (WDM) are considered. The main attention is paid to the so called structured warm dense matter (SWDM). The SWDM has partly (or fully) ionized plasma properties as well as crystal ones. The methods for WDM creation is described shortly. We give situations where SWDM demonstrates crystal or plasma features. The finite temperature density functional theory approach is deployed for description of the fcc LiF crystal in a two-temperature warm dense matter state with hot electrons and cold lattice that is formed after ultrafast energy deposition. The lattice stability and the interatomic bonding at elevated electronic temperatures are studied. The methods of molecular dynamics and collisional-radiative kinetics are used to investigate the plasma properties of WDM.

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Section: +14supporting

confidence: 89%

Section: +14mentioning

confidence: 98%

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Excited States of Warm Dense Matter

Norman

Skobelev

Stegaĭlov

2011

Contrib. Plasma Phys.

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“…In [9][10][11], a formula is given for the boundary of the spectrum of the paired electron ion states in the dense plasma (1) where ΔЕ is given in eV, N e -in cm -3 . This value might be compared to the ΔЕ value considered here because, for bound pairs, bound-bound transitions might be observed.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of optical properties of nonideal plasma within the electron concentration range 1017 cm−3 < N e < 1022 cm−3

Fedorovich

2014

High Temp

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The optical properties of nonideal plasmas within the electron concentration range 10 17 cm -3 < N e < 10 22 cm -3 are studied experimentally. According to these results, as well as to the data available in the literature, we obtain the experimental dependence of the ΔE (the difference between the atom ionization potential and the excitation potential of the upper level of the last observed emission or absorption line) value on the electron concentration within the range taken. The dependence is compared to the earlier obtained theoretical formulas. Recommendations on application of the experimental formula to determine the elec tron concentration in the external layers of the non ideal plasma at N e < 10 22 cm -3 are presented.

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Exciton Nature of Plasma Phase Transition in Warm Dense Fluid Hydrogen: ROKS Simulation**

Fedorov

Stegaĭlov

2022

ChemPhysChem

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The transition of warm dense fluid hydrogen from an insulator to a conducting state at pressures of about 20–400 GPa and temperatures of 500–5000 K has been the subject of active scientific research over the past few decades. However, various experimental and theoretical methods do not provide consistent results. In this work, we have applied the restricted open‐shell Kohn–Sham (ROKS) method for first principles molecular dynamics of dense hydrogen after thermal excitation to the first singlet excited state. The Wannier localization method has allowed us to analyze the exciton dynamics in this system. The model shows that a key mechanism of the transition is associated with the dissociation of electron‐hole pairs, which allows explaining several stages of the transition of fluid H2 from molecular state to plasma. This mechanism is able to give a quantitative description of several experimental results as well as to resolve the discrepancies between experimental studies.

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Density and Nonideality Effects in Plasmas

Cited by 26 publications

References 43 publications

Excited States of Warm Dense Matter

Excited States of Warm Dense Matter

Experimental study of optical properties of nonideal plasma within the electron concentration range 1017 cm−3 < N e < 1022 cm−3

Exciton Nature of Plasma Phase Transition in Warm Dense Fluid Hydrogen: ROKS Simulation**

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