Bestimmung der absoluten Übergangswahrscheinlichkeit der Linie C II 2511 Å

Ehrich, H.; Kusch, H. J.

doi:10.1007/bf01669451

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…But, t o our opinion, the introduction of such a potential is only based on heuristic arguments. To our knowledge, in plasma physics experimental data are only available for Iea while a determination of absolute levels seems to be difficult, [3]. However, the latter are of great importance for, e.g., a proper description of thermodynamics [4].…”

Section: Introductionmentioning

confidence: 99%

Dynamical screening and self‐energy of excitons in the electron–hole plasma

Zimmermann¹,

Kilimann

Kraeft

et al. 1978

Physica Status Solidi (b)

271

104

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The dependence of two-particle energies on plasma density is investigated using Green's functions. An effective exciton equation is derived taking into account dynamically screened potential and one-particle self-energies. A variational calculation shows that the bound state levels (exciton energies) remain practically constant whereas the continuum edge (band gap) shifts to lower energies with increasing density, which is in accordance with experimental observations. Die Abhiingigkeit der Zwei-Teilchen-Energien von der Plasmadichte wird im Formalismus Greenscher Funktionen untersucht. Es wird eine effektive Exziton-Gleichung abgeleitet, die ein dynamisch abgeschirmtes Potential und Ein-Teilchen-Selbstenergien beriicksichtigt. Eine Variationsrechuung zeigt, deD Energieniveaus gebundener Zustiinde (Exzitonenenergien) praktisch konstant bleiben, wiihrend sich die Kontinuumskante (die Bandliicke) mit wachsender Dichte zu kleineren Energien verschiebt, was mit experimentellen Ergebnissen ubereinstimmt.

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Section: Introductionmentioning

confidence: 99%

Dynamical screening and self‐energy of excitons in the electron–hole plasma

Zimmermann¹,

Kilimann

Kraeft

et al. 1978

Physica Status Solidi (b)

271

104

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“…Again, (helium) arc experiments [39]- [42] provided a large data set, as summarized in Fig. Again, (helium) arc experiments [39]- [42] provided a large data set, as summarized in Fig.…”

Section: More Recent Experimentsmentioning

confidence: 95%

Stark Broadening of the Hydrogen Balmer-α Line in Low and High Density Plasmas

Griem

2000

Contrib. Plasma Phys.

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Following a review of earlier measurements and calculations of the Stark broadening of the Balmer‐α line in plasmas of electron and ion densities from 108 — 1018 cm—3, recent measurements and various theoretical developments are discussed with emphasis on high densities up to Ne = 1019 cm—3 and temperatures up to kT = 10 eV. Although there is now fairly quantitative agreement between measured and calculated widths, shifts and profiles for Ne ≲ 1018 cm—3, serious disagreements are found beyond Ne ≈︂ 2 × 1018 cm—3. In particular, all calculations exhibit a stronger increase of widths with density than do the Bochum gas‐liner pinch measurements, possibly indicating a loss of coherence in the quantum‐mechanical interference between electron scattering on upper and lower levels of the line.

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“…In recent experimental studies on the Starkbroadening of hydrogen lines [1][2][3][4][5][6] severe discrepancies were observed between current broadening theories based on the approximation of static ions [7][8][9] and experiment, in particular for the central minimum of H^ and for lines with strong unshifted components, i.e. La and Ha.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Balmer-α Stark Broadening

Ehrich¹

1979

Zeitschrift Für Naturforschung A

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The Stark-broadened line profiles of Ha and Da have been measured in a wall stabilized argon arc at an electron density of ne = 1.4 X 10 16 cm -3 . Consistent with earlier experiments the obtained line profiles exhibit severe discrepancies to theoretical profiles based on the approximation of static ions and the line profiles were found to depend on the mass of the radiating atom. The measured half width of Da is about 15% smaller than the Ha-value. Recent calculations based on the "Model Microfield Method" greatly improve agreement with experiment.

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Bestimmung der absoluten Übergangswahrscheinlichkeit der Linie C II 2511 Å

Cited by 5 publications

References 5 publications

Dynamical screening and self‐energy of excitons in the electron–hole plasma

Dynamical screening and self‐energy of excitons in the electron–hole plasma

Stark Broadening of the Hydrogen Balmer-α Line in Low and High Density Plasmas

Experimental Study of Balmer-α Stark Broadening

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