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氦、锂和铍原子的基态波函数通过叠加不同的配置进行近似,扩展长度从氦的35到铍的55。总能量的误差为氦0.014 eV,锂0.026 eV和铍0.17 eV。对氦的最低^3S态也应用了19个配置的函数,结果的精确度为0.0005 eV。对Z=8的所有等电子离子系列也进行了计算,误差仍然保持同一数量级,但随着Z的增大而增加。锂的电子亲和力下限设定为0.4773 eV,通过外推等电子系列获得的最可能值为0.62 eV.
A. W. Weiss (Thu,)研究了这个问题。
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