• Українська
  • English

< | >

Current issue   Ukr. J. Phys. 2017, Vol. 62, N 6, p.489-494
https://doi.org/10.15407/ujpe62.06.0489    Paper

Fedorovich O.A., Voitenko L.M.

Institute for Nuclear Research, Nat. Acad. of Sci. of Ukraine
(47, Prosp. Nauky, Kyiv 03680, Ukraine; e-mail: oafedorovich@kinr.kiev.ua)

Lifetime of electrons in Dense Plasma

Section: Plasmas and Gases
Original Author's Text: Ukrainian

Abstract: The experimentally determined average lifetimes of electrons and ions in the dense plasma of pulsed discharges in water are reported. The lifetimes of charged particles in dense plasma are shown to be practically independent of the time. The specific lifetime values are found to lie in a vicinity of 10−5 s and vary from 5 × 10−6 to 3 × 10−5 s at various discharge stages, when the parameters of discharge plasma are changed. In particular, the concentration of electrons in plasma is changed from 1015 to 1022 cm−3 , and the temperature from 7 × 103 to 64 × 103 K. We explain this phenomenon by the “non-realization of levels” in the radiation spectra and by the strong broadening of observed spectral lines in high microfields of dense plasma, when the latter achieve values close to intraatomic ones. Experimental data obtained for the lifetimes of charged particles are compared with the results of theoretical calculations made by various authors.

Key words:  nonideal plasma, pulsed discharges in water, electric microfields, lifetime of charged particles, recombination of charged particles.


  1. O.A. Fedorovich. About the "enlightenment" of nonideal hydrogen-oxygen plasma at electrons' concentration Ne ≤ ≤ 3×1019 cm−3. Vopr. At. Nauki Tekhn. Ser. Fiz. Plasmy No. 1, 198 (2013).
  2. O.A. Fedorovich. Experimental study of the optical properties of nonideal plasma in an electron concentration interval 1017 cm−3 ≤ Ne ≤ 1022 cm−3. Teplofiz. Vys. Temp. 52, 524 (2014) (in Russian).
  3. Yu.K. Kurilenkov, E.T. Protasevich. On the features of long-term plasma formations. Pis'ma Zh. Tekhn. Fiz. 15/14, 7 (1989) (in Russian).
  4. A.V. Chernetsky. Introduction to Plasma Physics (Atomizdat, 1969) (in Russian).
  5. O.A. Malkin. Pulse Current and Relaxation in Gas (Atomizdat, 1974) (in Russian).
  6. E.T. Protasevich. Ball Lightning (IVTAN, 1991) (in Russian).
  7. L.M. Biberman, V.S. Vorob'ev, I.T. Yakubov. Kinetics of Nonequilibrium Low-Temperature Plasmas (Consultants Bureau, 1987).
  8. O.A. Fedorovich, L.M. Voitenko. Experimental researches of the decay coefficient of nonideal plasma produced at pulsed discharges in water. Ukr. Fiz. Zh. 53, 451 (2008) (in Ukrainian).
  9. O.A. Fedorovich, L.M. Voitenko. On the decay coefficient of nonideal plasma produced at pulsed discharges in water at electron concentrations 2 × 1020 cm−3 ≥ Ne ≥ ≥ 1017 cm−3. Vopr. At. Nauki Tekhn. No. 4, 288 (2008) (in Russian).
  10. O.A. Fedorovich, L.M. Voitenko. On the decay coefficients of nonideal plasma at an explosion of tungsten conductor in water. Vopr. At. Nauki Tekhn. No. 4, 354 (2010) (in Russian).
  11. C.L. Johnson, E. Hinnov. Ionization, recombination and population of excited levels in hydrogen plasmas. J. Quant. Spectrosc. Add. Radiat. Trasfer. 13, 333 (1973).
  12. A. Lankin, G. Norman. Density and nonideality effects in plasmas. Contrib. Plasma Phys. 49/10, 723 (2009).
  13. O.A. Fedorovich. About unrealization of tungsten lines up to the ground state in the nonideal plasma of pulse discharges in water. Probl. At. Sci. Techn. No. 1, 145 (2009).