Fast approximation to supershell partition functions: Explicit forms of the coefficients

Article Physics, Fluids & Plasmas

A fast approximation to supershell partition functions

Brian G. Wilson et al.

Summary: A formula for supershell partition functions, derived in this article as a functional of the distribution of energies within the supershell, provides an alternative expansion for an arbitrary number of electrons or holes. It allows for quick approximate evaluations with a truncated number of terms in the expansion.

HIGH ENERGY DENSITY PHYSICS (2022)

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Article Physics, Fluids & Plasmas

Adaptive Algorithm for the Generation of Superconfigurations in Hot-Plasma Opacity Calculations

Jean-Christophe Pain

Summary: In hot plasmas, where the number of ionic excited states can be enormous, the conventional handling of electron configurations becomes impractical. The Super Transition Array approach offers a statistical method for calculating massic photo-absorption cross-section or radiative opacity by grouping similar energy configurations. However, the selection of relevant configurations remains a challenge. This study discusses various aspects of generating superconfigurations in hot plasmas and proposes an adaptive algorithm.

PLASMA (2022)

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Article Physics, Fluids & Plasmas