Recent developments in X-ray tests of quantum electrodynamics1
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چکیده
Experimental tests of quantum electrodynamics (QED) have developed dramatically for simple systems of hydrogen and helium, but there has also been significant progress for medium-Z hydrogenic and helium-like atoms over the last few years. In this area, tests are often based on X-ray spectroscopic measurements, and here we review some key developments. Of particular interest is the status of few-electron QED in the medium-Z regime, the fine-structure Lamb shift from X-ray measurements, tests of two-electron QED, and of np subshell and excited state QED. We discuss some recent secondary tests of the data to confirm the quality and different approaches to experimental development to address the dominant systematics in this area. PACS Nos: 31.15.Pf, 31.30.Jv, and 32.10.Hq Résumé : Les tests expérimentaux de QED dans des systèmes simples comme l’hydrogène et l’hélium ont augmenté rapidement, mais il y a eu aussi des progrès notables pour des atomes de Z intermédiaire de type hydrogène ou hélium. Ces tests sont souvent basés sur des mesures spectroscopiques X et nous en passons ici en revue les développements clés. Particulièrement intéressants sont les effets QED dans les système à quelques électrons avec une valeur intermédiaire de Z, le déplacement de structure fine de Lamb par mesure X, les tests QED pour deux électrons, ainsi que pour les états de la sous-couche np et excités. Nous analysons quelques tests secondaires sur les données afin d’en confirmer la qualité et différentes approches pour développer les expériences qui visent les aspects les plus importants du domaine. [Traduit par la Rédaction]
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تاریخ انتشار 2009