Higher-order binding corrections to the Lamb shift
Higher-order binding corrections to the Lamb shift
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DOI：
10.1103/physreva.54.1853
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发表时间：
1996-09
期刊：
影响因子：
--
通讯作者：
U. Jentschura;G. Soff;P. Mohr
中科院分区：
文献类型：
--
作者：
U. Jentschura;G. Soff;P. Mohr
本文报道了低核电荷Z系统中兰姆位移的高阶结合修正评估的现状和进展。最近，对低Z核电荷体系中nP态兰姆位移的所有结合修正的评估已经完成，直到/spl alpha//sup 7/（n=2,3,4）量级。使用数值结果的外推，还可以获得对激发 S 态进行高阶校正的近似值。此外，一项计算正在进行中，其最终目标是消除低 Z 型级数展开或高 Z 数值数据外推所产生的任何误差。该计算涉及对某些超几何级数使用收敛加速技术，并利用 NIST SGT POWER ONYX 和 IBM SP/2 超级计算设施。
This paper reports the status and progress regarding the evaluation of higher order binding corrections to the Lamb shift in systems with low nuclear charge Z. Recently, the evaluation of all binding corrections to the Lamb shift of nP states in hydrogenlike systems at low Z up to the order of /spl alpha//sup 7/ (n=2,3,4) has been completed. Using an extrapolation of numerical results, it is possible to obtain an approximate value for higher-order corrections to excited S-states also. Moreover, a calculation is in progress whose ultimate goal is to eliminate any error from low-Z type series expansions or extrapolations of numerical data for high Z. This calculation involves the use of convergence acceleration techniques for certain hypergeometric series and takes advantage of the NIST SGT POWER ONYX and IBM SP/2 supercomputing facilities.