# Hannover 2010 – wissenschaftliches Programm

## Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

# P: Fachverband Plasmaphysik

## P 22: Poster: Theory/Modelling II

### P 22.7: Poster

### Donnerstag, 11. März 2010, 16:00–18:00, Lichthof

**Static and Dynamic Structure Factors with Account of the Ion Structure for High-temperature Alkali and Earth-alkali Plasmas** — •Saltanat Polatovna Sadykova^{1}, Werner Ebeling^{1}, and Igor Mijail Tkachenko^{2} — ^{1}Institut für Physik, Humboldt Universitat zu Berlin, Newtonstr. 15, 12489 Berlin, Germany — ^{2}Department of Applied Mathematics, Polytechnic University of Valencia, 46022 Valencia, Spain

The structure factors (SF) are the fundamental quantities that describes the X-ray scattering cross-section in a plasma. The recent work (G. Gregori et al. Phys. Rev. E **74**, 026402 (2006)) has shown that the technique, developed in the classical work of Bogoljubow for determination of the screened Deutsch potential for point-like charges, provides good expressions of SF even for moderately coupled plasmas. However, it is of high interest to take into account the ion shell structure. We calculate the *e*−*e* , *e*−*i*, *i*−*i* and charge-charge static structure factors for Alkali (Li^{+}, Na^{+}, K^{+}, Rb^{+}, Cs^{+}) at *T*≥ 30000 *K* and Be^{2+} at *T*≥ 100000 *K* plasmas using the method described by G. Gregori et al. We also study the dynamic structure factors for Alkali plasmas using the Adamjans’ et al method ( S. V. Adamjan et al., Phys. Rev. E **48**, 2067 (1993)). For determination of the static and dynamic structure factors we use the screened Hellmann-Gurskii-Krasko potential which takes into an account not only the quantum-mechanical effects but also the ion shell structure (S. Sadykova, Contr.Plasma Phys. **49**, 76 (2009)). The results show that at high coupling the ion structure plays significant role and must be taken into account.