Properties of the positronium negative ion embedded in non-ideal classical plasmas have been studied theoretically. A pseudopotential, derived from a solution of Bogolyubov’s hierarchy equations, is used to describe the interaction potentials of the charged particles in the ion. A large basis set is employed in Rayleigh–Ritz variational method to compute accurately various quantities, such as binding energy, cusp values, annihilation rate, associated with the ground state of the ion. A detailed study is made on the effects of non-ideality of plasma on those quantities. In particular, special emphasis is given to determine the ranges of plasma screening parameters within which the ion remains stable.

中文翻译：

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嵌入非理想经典等离子体中的正电子负离子的性质

已从理论上研究了嵌入在非理想经典等离子体中的正电子负离子的性质。源自 Bogolyubov 层次方程解的赝势用于描述离子中带电粒子的相互作用势。Rayleigh-Ritz 变分方法中使用了一个大的基组来精确计算与离子基态相关的各种量，例如结合能、尖点值、湮灭率。对等离子体的非理想性对这些量的影响进行了详细研究。特别强调确定离子保持稳定的等离子体筛选参数的范围。