Inverse Bremsstrahlung in Astrophysical Plasmas: The Absorption Coefficients and Gaunt Factors

Mihajlov, A. A.; Srećković, Vladimir A.; Sakan, N. M.

doi:10.1007/s12036-015-9350-0

Cited by 6 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The usage of Cut-off Coulomb model potential was applied in the fully quantum mechanical solution for determining the optical properties of dense hydrogen plasma. Up until now the results were presented and used for instance see Dimitrijević et al (2018); Srećković et al (2018); Mihajlov et al (2015Mihajlov et al ( , 2011; Ignjatović et al (2017); Ignjatović et al (2009). Both Coulomb as well as cut-off Coulomb potential is presented in Eq.…”

Section: Models Used For Describing Dense Plasmamentioning

confidence: 99%

The development of simplified approach in describing of the ionic field to emitter interaction in stellar and laboratory plasmas

Sakan,

Simić,

Srećković

et al. 2023

caosp

View full text Add to dashboard Cite

Dense plasma of moderate and strong non-ideality is of growing interest in physics related to stellar and laboratory plasma. Up until now the optical parameter of hydrogen plasma of mid and moderately high nonideality parameter could be described successfully, thus enabling the modeling of optical properties. But the model potential used does not include the correct plasma interaction in it's basic form. The influence of dense packing ionic structure onto the form of potential is investigated in this paper. The presented results are a step towards the more precise description of ionic field influence onto the plasma microfield when the dynamic of the ionic structure is neglected and the dense packing assumed.

show abstract

Section: Models Used For Describing Dense Plasmamentioning

confidence: 99%

The development of simplified approach in describing of the ionic field to emitter interaction in stellar and laboratory plasmas

Sakan,

Simić,

Srećković

et al. 2023

caosp

View full text Add to dashboard Cite

show abstract

“…As in [3,5,8], we will take the value U p;c as the zero of energy. After that, the potential Equation (2) is transformed to the form…”

Section: The Approximation Of the Cut-off Coulomb Potentialmentioning

confidence: 99%

“…By now, this approximation has been used in order to describe transport properties of dense plasmas (e.g., [1,5,6]), but it was clear that it could be applied to some absorption processes in non-ideal plasmas too [3,[7][8][9]. This topic itself, and the search for more consistent models of screening and more realistic potentials in plasmas is still continuing and is very real (e.g., [10][11][12][13] and references therein).…”

Section: Introductionmentioning

confidence: 99%

The Application of the Cut-Off Coulomb Model Potential for the Calculation of Bound-Bound State Transitions

Sakan

Srećković

Simić

et al. 2018

Atoms

View full text Add to dashboard Cite

Abstract:In this contribution, we present results of bound state transition modeling using the cut-off Coulomb model potential. The cut-off Coulomb potential has proven itself as a model potential for the dense hydrogen plasma. The main aim of our investigation include further steps of improvement of the usage of model potential. The results deal with partially ionized dense hydrogen plasma. The presented results covers N e = 6.5 × 10 18 cm −3 , T = 18, 000 K and N e = 1.5 × 10 19 cm −3 , T = 23, 000 K, where the comparison with the experimental data should take place, and the theoretical values for comparison. Since the model was successfully applied on continuous photoabsorption of dense hydrogen plasma in the broad area of temperatures and densities, it is expected to combine both continuous and bound-bound photoabsorption within single quantum mechanical model with the same success.

show abstract

“…In Mihajlov et al (2015) the significance of the model potential used in this paper was emphasized. One of the model Coulomb screening potentials, known as the cut-off potential, had already been introduced in Suchy (1964), and had been investigated in connection with the transport plasma properties in Mihajlov et al (1986).…”

Section: The Potential and Electrostatic Screening Modelmentioning

confidence: 99%

Free–free absorption coefficients and Gaunt factors for dense hydrogen-like stellar plasma

Srećković

Sakan

Šulić

et al. 2018

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

In this work, we present a study dedicated to determination of the inverse bremsstrahlung absorption coefficients and the corresponding Gaunt factor of dense hydrogen-like stellaratmosphere plasmas where electron density and temperature change in a wide range. A method suitable for this wide range is suggested and applied to the inner layers of the solar atmosphere, as well as the plasmas of partially ionized layers of some other stellar atmospheres (for example, some DA and DB white dwarfs) where the electron densities vary from 10 14 cm −3 to 10 20 cm −3 and temperatures from 6000 K to 300 000 K in the wavelength region of 10 nm ≤ λ ≤ 3000 nm. The results of the calculations are illustrated by the corresponding figures and tables.

show abstract

Inverse Bremsstrahlung in Astrophysical Plasmas: The Absorption Coefficients and Gaunt Factors

Cited by 6 publications

References 11 publications

The development of simplified approach in describing of the ionic field to emitter interaction in stellar and laboratory plasmas

The development of simplified approach in describing of the ionic field to emitter interaction in stellar and laboratory plasmas

The Application of the Cut-Off Coulomb Model Potential for the Calculation of Bound-Bound State Transitions

Free–free absorption coefficients and Gaunt factors for dense hydrogen-like stellar plasma

Contact Info

Product

Resources

About