Physical properties of dense, low-temperature plasmas

Redmer, R.

doi:10.1016/s0370-1573(96)00033-6

Cited by 184 publications

(207 citation statements)

References 396 publications

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“…The contributions d ec ll are calculated in T matrix approximation, see also [9,29,30]. For electron-ion and electron-atom collisions we treat the ions and atoms classical.…”

Section: Electrical Conductivity In T Matrix Approximationmentioning

confidence: 99%

Contribution of electron-atom collisions to the plasma conductivity of noble gases

2017

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We present an approach which allows the consistent treatment of bound states in the context of the dc conductivity in dense partially ionized noble gas plasmas. Besides electron-ion and electronelectron collisions, further collision mechanisms owing to neutral constituents are taken into account. Especially at low temperatures T ≈ 1eV, electron-atom collisions give a substantial contribution to the relevant correlation functions. We suggest an optical potential for the description of the electronatom scattering which is applicable for all noble gases. The electron-atom momentum-transfer cross section is in agreement with experimental scattering data. In addition the influence of the medium is analysed, the optical potential is advanced including screening effects. The position of the Ramsauer minimum is influenced by the plasma. Alternative approaches for the electron-atom potential are discussed. Calculations of the electrical conductivity are compared with experimental data.

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“…The contributions d ec ll are calculated in T matrix approximation, see also [9,29,30]. For electron-ion and electron-atom collisions we treat the ions and atoms classical.…”

Section: Electrical Conductivity In T Matrix Approximationmentioning

confidence: 99%

Contribution of electron-atom collisions to the plasma conductivity of noble gases

2017

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“…The dielectric function itself can be determined from the polarization function according to Equation (20). The medium modifications of spectral line shapes can be described in a systematic way from the bound-bound two-particle polarization function Π 2 (q, ω) [2,13,25,65]. From Equations (20), (23) and (24) …”

Section: Discussionmentioning

confidence: 99%

Spectral Line Shapes of He I Line 3889 Å

Omar

González

et al. 2014

Atoms

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Spectral line shapes of neutral helium 3889 Å (2 3 S-3 3 P ) transition line are calculated by using several theoretical methods. The electronic contribution to the line broadening is calculated from quantum statistical many-particle theory by using thermodynamic Green's function, including dynamic screening of the electron-atom interaction. The ionic contribution is taken into account in a quasistatic approximation, where a static microfield distribution function is presented. Strong electron collisions are consistently considered with an effective two-particle T-matrix approach, where Convergent Close Coupling method gives scattering amplitudes including Debye screening for neutral helium. Then the static profiles converted to dynamic profiles by using the Frequency Fluctuation Model. Furthermore, Molecular Dynamics simulations for interacting and independent particles are used where the dynamic sequence of microfield is taken into account. Plasma parameters are diagnosed and good agreements are shown by comparing our

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“…The cutoff radius r 0 is used to regularize the behaviour at small distances. Its value given in the literature [35] is r 0 = 1.4565 a B . However, we suggest here the use of a different value r 0 = 1.033 a B , which yields the correct H − ion ground state energy E 0 = −0.7542 eV as the eigenvalue of the effective radial Schrödinger equation [6].…”

Section: B Polarization Potential Modelsmentioning

confidence: 99%

“…The influence on the scattering processes using screened versions of the Buckingham and the RDO models has been treated in Refs. [15,35] and will not repeated here. A systematic approach to screening effects is given within the Green's function theory [6].…”

Section: Generalized Beth-uhlenbeck Approachmentioning

confidence: 99%

Cluster virial expansion for the equation of state of partially ionized hydrogen plasma

et al. 2010

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We study the contribution of electron-atom interaction to the equation of state for partially ionized hydrogen plasma using the cluster-virial expansion. For the first time, we use the BethUhlenbeck approach to calculate the second virial coefficient for the electron-atom (bound cluster) pair from the corresponding scattering phase-shifts and binding energies. Experimental scattering cross-sections as well as phase-shifts calculated on the basis of different pseudopotential models are used as an input for the Beth-Uhlenbeck formula. By including Pauli blocking and screening in the phase-shift calculation, we generalize the cluster-virial expansion in order to cover also near solid density plasmas. We present results for the electron-atom contribution to the virial expansion and the corresponding equation of state, i.e. pressure, composition, and chemical potential as a function of density and temperature. These results are compared with semi-empirical approaches to the thermodynamics of partially ionized plasmas. Avoiding any ill-founded input quantities, the Beth-Uhlenbeck second virial coefficient for the electron-atom interaction represents a benchmark for other, semi-empirical approaches.

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Physical properties of dense, low-temperature plasmas

Cited by 184 publications

References 396 publications

Contribution of electron-atom collisions to the plasma conductivity of noble gases

Contribution of electron-atom collisions to the plasma conductivity of noble gases

Spectral Line Shapes of He I Line 3889 Å

Cluster virial expansion for the equation of state of partially ionized hydrogen plasma

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