A generalized quasi-sum relations for oscillator strengths in transition arrays: theoretical study of the opacity of Ge plasmas

Peng, Yan; Xia, D.; Li, J.M.

doi:10.1016/j.jqsrt.2003.12.024

Cited by 9 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such detailed structures result from the electron correlations and can be treated by a configuration interaction calculation. [35] The doped Al in our experiments contributed only weak bound-free and free-free continuum absorptions in the concerned photon energy range. The transmission uncertainties, determined mainly by the backlight brightness and spectrometer sensitivity variations, are accurate to approximately ∼10% over the 400-800 eV photon energy range, and about ∼15% in the energies above 800 eV.…”

Section: Microchanner Platementioning

confidence: 66%

Time-Resolved Transmission Measurements of Warm Dense Iron Plasma

Qing

Zhao

Wei

et al. 2016

Chinese Phys. Lett.

View full text Add to dashboard Cite

Transmission measurements of warm dense iron plasma are reported over the photon energy range of 400–1200 eV, including the strong 2p–3d structures. One-dimensional hydrodynamic simulation is performed to estimate the plasma conditions: temperatures of several eV and densities of about 0.1 g/cm3. By using the simulated temperature and density, the calculations of the transmission spectra are performed and compared with the time-resolved experimental results.

show abstract

Section: Microchanner Platementioning

confidence: 66%

Time-Resolved Transmission Measurements of Warm Dense Iron Plasma

Qing

Zhao

Wei

et al. 2016

Chinese Phys. Lett.

View full text Add to dashboard Cite

show abstract

“…Germanium is one of the absorption and switching material in indirectly driven inertial confinement fusion and therefore its radiative property is of great interest both experimentally and theoretically [1][2][3][4][5][6][7][8][9]. The radiative opacity of open-M-shell germanium plasmas are of particular experimental interest, especially in the region of 2p-3d and 2p-4d transition arrays.…”

Section: Introductionmentioning

confidence: 99%

Detailed Theoretical Investigations on the L-Shell Absorption of Open-M-Shell Germanium Plasmas:Effect of Autoionization Resonance Broadening

Xiang¹,

Zeng²,

Fu³

et al. 2012

JMP

View full text Add to dashboard Cite

Radiative opacity of open-M-shell germanium plasmas in the L-shell photon energy region were investigated in detail by using a fully relativistic detailed level accounting approach. Among other physical effects such as relativistic and the interaction between fine-structure levels belonging to the same non-relativistic configuration and different configurations, particular attention is paid on the effect of autoionization resonance broadening on the L-shell absorption. The results show that for plasmas at present and past typical experimental conditions, line width due to autoionization resonance broadening dominate among all the physical broadening mechanisms including electron impact and Doppler broadenings. Such an effect is most pronounced for ions with just a few 2p-nd transition lines such as , while it is not so pronounced for complex ions such as Ge , where there are so many 2p-nd lines that line overlapping partly conceal the effect of autoionization resonance broadening. After taking the effect of autoionization resonance broadening into account, detailed comparisons are made with available experimental spectra at different physical conditions of different plasma temperatures and densities. The L-shell absorption is sensitive to the plasma temperature, especially in the 2p-3d excitation energy region. The potential of utlizing the relative shape and intensity of the 2p-3d spin-orbit splitting as temperature diagnostics is investigated.

show abstract

“…Germanium is one of the materials used for x-ray pre-heat shielding in indirectly driven inertial confinement fusion and therefore its radiative property is of great interest both experimentally and theoretically [1][2][3][4][5][6][7][8][9]. The radiative opacity of open-M-shell germanium plasmas is of particular experimental interest, especially in the region of 2p-3d transition arrays.…”

Section: Introductionmentioning

confidence: 99%

Autoionization widths of open-M-shell germanium ions: effects on inner-shell absorptions

Xiang¹,

Fu²,

Cheng³

et al. 2012

Phys. Scr.

View full text Add to dashboard Cite

Large-scale configuration interaction calculations were carried out to obtain the level-by-level autoionization (AI) rates and resonance widths of the inner-shell excited configurations for the open-M-shell germanium ions. Detailed results are presented for Ge5+ as an example. The dominant ionization channels of the autoionized levels 2p53/23s23p63d10 and 2p51/23s23p63d10 of Ge5+ were determined, and it is shown that the channel from level 3s23p6(3d−13/23d−15/2)4 contributes the largest fraction of AI widths of 0.195 and 0.188 eV to the total width of 0.577 and 0.544 eV, respectively, from all possible channels. For typical experimental plasmas at temperatures of several tens and hundreds of eV, the AI resonance broadening is the dominant mechanism among the Doppler, electron impact and natural lifetime broadenings. Among the physical effects such as relativistic and the interaction between fine-structure levels belonging to the same non-relativistic configuration and different configurations, particular attention is paid to the effect of AI resonance broadening on the L-shell absorption. Different features of the inner-shell absorption due to AI broadening are presented in detail for Ge5+, Ge10+ and Ge17+. The total AI widths of levels from the configuration of one 2p electron being excited to 3d orbital were systematically investigated for Ge6+–Ge21+. Except for Ge20+ and Ge21+, the AI widths of the open-M-shell germanium ions dominate over all other line broadening mechanisms.

show abstract

A generalized quasi-sum relations for oscillator strengths in transition arrays: theoretical study of the opacity of Ge plasmas

Cited by 9 publications

References 30 publications

Time-Resolved Transmission Measurements of Warm Dense Iron Plasma

Time-Resolved Transmission Measurements of Warm Dense Iron Plasma

Detailed Theoretical Investigations on the L-Shell Absorption of Open-M-Shell Germanium Plasmas:Effect of Autoionization Resonance Broadening

Autoionization widths of open-M-shell germanium ions: effects on inner-shell absorptions

Contact Info

Product

Resources

About