Publication:
Hydrogen, helium and lithium plasmas at high pressures

Дата
2020
Авторы
Ebeling, W.
Reinholz, H.
Ropke, G.
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Научные группы
Организационные подразделения
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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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Аннотация
© 2020, The Author(s).The equations of state (EoS) and other thermodynamic properties of plasmas of the light elements H, He, and Li, are calculated using inverted fugacity expansions. Fugacity expansions are known as an alternative to density expansions but show often an inferior convergence. If, however, the inversion can be solved, the fugacity representations may be very efficient. In particular, the contributions of deeply bound states are included in the fugacity expansion in a very effective way. The mathematical problems on nonlinearity connected with the inversion of fugacities to densities are reduced to solvable algebraic problems. The inversion of fugacities to densities is solved separately for two density regions: (i) In the low density, non-degenerate region we consider ring contributions describing screening effects and ladder contributions describing bound state formation. (ii) In the high density, degenerate region the electrons are described by the Fermi–Dirac distribution. Hartree–Fock contributions and Pauli blocking have to be taken into account. The ions are considered as classical, strongly correlated subsystem eventually forming a Wigner lattice. We solve the inversion problem for each of the regions. Near the crossing point, the separate solutions are connected to each other, either by smooth concatenation at the crossing point or by Padé approximations.
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Цитирование
Ebeling, W. Hydrogen, helium and lithium plasmas at high pressures / Ebeling, W., Reinholz, H., Ropke, G. // European Physical Journal: Special Topics. - 2020. - 229. - № 22-23. - P. 3403-3431. - 10.1140/epjst/e2020-000066-6
URI
https://www.doi.org/10.1140/epjst/e2020-000066-6
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85097784078&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000600116700010
 https://openrepository.mephi.ru/handle/123456789/22702
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