A simple pure-exponential type wavefunction in the Ritz variational framework has been proposed to estimate precise eigenenergies and radial distributions of $nl$ [$n=$ 1–8; $l=$ 0–7] states of ${}^{2}L$ [$L=$ 0–7] symmetry of hydrogen iso-electronic ions ($Z$=1–18) under classical weakly coupled plasma and dense quantum plasma environment. Critical screening parameters, beyond which the ions cease to be in a bound state, have also been estimated for both types of plasma background.

中文翻译：

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类氢离子的结构特性（$ž=$ 1–18）在量子和经典等离子体环境下

在Ritz变分框架中，一个简单的纯指数型波函数被提出以估计精确的本征能和径向分布。 $ñ升$ [$ñ=$ 1–8; $升=$ 0–7]的状态 ${}^2\mathrm{大号}$ [$\mathrm{大号}=$ [0-7]氢等电子离子的对称性（$ž$= 1–18）在经典的弱耦合等离子体和密集量子等离子体环境下。对于两种类型的等离子体背景，也已经估计出了关键的筛选参数，超过该参数离子将不再处于束缚状态。