Quantum Chemical Simulation of Non-Regular Covalent Structures

Density and Nonideality Effects in Plasmas

“…The result can be related to the Unsöld formula and [42]. However relation of the gap to the plasma frequency [30,32] is not excluded as well. Rotation frequency of an electron in the pair is ω ∼ E 3/2 , plasma frequency is ω 0 ∼ n 1/2 e , the border of the pair stability could be defined as ω = ω 0 and we obtain ΔE ∼ n 1/3 e .…”

“…As collective excitations have fluctuation nature, the idea of the crossover is to bridge collective fluctuations or excitations (plasma waves) to multiple fluctuations, then to pair fluctuations, and finally to excited atoms which could be considered as stabilized pair fluctuations. The possible effect of the multi-particle fluctuations on the electron spectrum in the intermediate region is discussed in [30,32].…”

“…The concept of a soft gap between excited atoms and free electrons in the electron spectrum of NP is introduced in [43]. The authors [30,32] agree with the idea of a soft gap but suggested that it is filled partially by the less populated states of electrons localized in the long wave fluctuations of charge density. Fig.…”

Experimental study of optical properties of nonideal plasma within the electron concentration range 1017 cm−3 < N e < 1022 cm−3

“…In the absorption spec trum, ΔЕ = 5.01 eV at this time moment. The N e esti mations according to (1) and according to the formula from [15] give, for 23 μs, the values 1.5 × 10 21 cm -3 and 3 × 10 21 cm -3 , respectively. The nonideality degree, γ ≈ 2.5.…”

“…The formulas from [12][13][14][15][16] are also used to esti mate the electron density. However, with the decrease in the principal quantum number, the distance between the lines increases; in the Balmer series, between the Н α and the Н β , it equals 170 nm.…”