Plasma screening effects on the atomic structure and radiative opacity of dense carbon plasmas based on the DLA model

Cheng, Guangquan; Zeng, Jiaolong; Yuan, Jing

doi:10.1016/j.hedp.2011.01.001

Cited by 27 publications

(15 citation statements)

References 49 publications

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“…This shift of spectral lines is due to the modification of the electrostatic potential by the free electron distribution near the bound electron orbits. The wavelength shift of spectral lines was reported in the previous work [18,39,45]. It should be noted that the line shifting interferes with the broadening of lines.…”

Section: B Atomic and Optical Properties Of Dense Copper Plasmasupporting

confidence: 53%

“…Opacities and emissivities of dense carbon and aluminum plasmas are also validated against the available data [18,26,39,40]. The average charge state, spectral LTE and CRSS (non-LTE) opacities and emissivities of warm dense copper plasma are investigated and discussed.…”

Section: Resultsmentioning

confidence: 93%

“…3(a) with the spectral opacity derived from the detail level accounting (DLA) model based on the DiracFock (DF) approach for calculating the atomic data [18]. Although the DF-DLA model is more accurate, it can be seen in Fig.…”

Section: A Benchmarking the Reodp Codementioning

confidence: 99%

“…The approximation of local thermodynamic equilibrium (LTE) is usually assumed to be valid at high plasma densities in the WDM regime where collisions prevail [17][18][19]. Although some fraction of energetic photons can be absorbed in dense plasma, this may not have a significant influence on the ionization-excitation balance.…”

Section: Introductionmentioning

confidence: 99%

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Atomic and optical properties of warm dense copper

Miloshevsky

Hassanein

2015

Phys. Rev. E

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The emission of X-rays from warm dense matter is of great interest for both spectroscopic diagnostics and development of intense X-ray sources. We report the results from the collisionalradiative steady state (CRSS) modeling of atomic and optical properties of copper plasmas at near-solid and solid-state density for a range of temperatures. The CRSS model is validated against the available data on the average charge state and shifts of energy levels in aluminum and the opacity and emissivity spectra of carbon and aluminum plasmas. The average charge states, number density of ion species, and free electrons as a function of temperature are investigated for the solid-density copper plasma. Due to dense plasma environment the four outer electrons are found to be unbounded even in the low-temperature limit ~1 eV. As the temperature changes from 1 eV to 100 eV, the predominant species vary from five-fold to twelve-fold ionized copper ions. The opacity and emissivity spectra of dense copper plasmas are studied using the local thermodynamic equilibrium (LTE) and non-LTE approaches. It is found that the non-LTE effects are important in the spectral region of soft X-rays emitted from the K-shell. The emissivity in spectral lines is completely suppressed indicating the importance of the energy-dissipating radiative processes in this soft X-ray region. The line broadening and red shifts of the K-shell 2 and L-shell spectral lines toward higher wavelengths are observed with the increase of plasma density. These results have important implications for understanding the radiative properties of warm dense copper and can be useful for future experimental studies. * gennady@purdue.edu 3

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Section: B Atomic and Optical Properties Of Dense Copper Plasmasupporting

confidence: 53%

Section: Resultsmentioning

confidence: 93%

Section: A Benchmarking the Reodp Codementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Atomic and optical properties of warm dense copper

Miloshevsky

Hassanein

2015

Phys. Rev. E

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“…In the present TDRE formalism, a detailed level accounting (DLA) method is implemented. DLA is one of the most accurate method in obtaining the radiative properties of hot dense plasmas [20][21][22][23]. The evolution dynamics of the population of level i is determined by the following TDRE,…”

Section: Theoretical Methodsmentioning

confidence: 99%

Effects of Direct Double Auger Decay on the Population Dynamics of Neon Irradiated by Ultraintense x‐ray Pulses

Cheng

Zeng

Yuan

2014

Contrib. Plasma Phys.

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The population and charge state distribution of neon interacting with ultraintense x-ray pulses are investigated by solving a time-dependent rate equation in the detailed level-accounting (DLA) approximation. Due to the detailed description of neon atom and ions, our DLA result improves the agreement between predictions and experimental measurements for odd neon charge states. In the framework of the DLA formalism, we further studied the effects of direct double Auger decay (DDAD) on charge state distribution. After the 1s photoionization of neon atom, the DDAD processes give accessible decay channels from the K-shell hole state of Ne + to levels of Ne 3+ , resulting in an increase of the population fraction of Ne 3+ and a decrease of that of Ne 2+ . Compared with the results without considering the DDAD effects, better agreement is obtained between theory and experiment.

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Strongly coupled plasma effect on excitation energies of O-like ions and photoionization of F-like ions

Sharma

Goyal

2021

Indian J Phys

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Plasma screening effects on the atomic structure and radiative opacity of dense carbon plasmas based on the DLA model

Cited by 27 publications

References 49 publications

Atomic and optical properties of warm dense copper

Atomic and optical properties of warm dense copper

Effects of Direct Double Auger Decay on the Population Dynamics of Neon Irradiated by Ultraintense x‐ray Pulses

Strongly coupled plasma effect on excitation energies of O-like ions and photoionization of F-like ions

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