Precise determination of the 1s Lamb Shift in hydrogen-like lead and gold ions using microcalorimeters

Quantum electrodynamics in very strong Coulomb fields is one scope which has not yet been tested experimentally with suffcient accuracy to really determine whether the perturbative approach is valid. One sensitive test is the determination of the 1s Lamb Shift in highly-charged very heavy ions. The...

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Bibliographic Details
Published inarXiv.org
Main Authors Kraft-Bermuth, S, Andrianov, V, Bleile, A, Echler, A, Egelhof, P, Grabitz, P, Ilieva, S, Kiselev, O, Kilbourne, C, McCammon, D, Meier, J P, Scholz, P
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 10.08.2016
Subjects
Calorimeters
Gold
Heavy ions
Physics - Atomic Physics
Quantum electrodynamics
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Summary:Quantum electrodynamics in very strong Coulomb fields is one scope which has not yet been tested experimentally with suffcient accuracy to really determine whether the perturbative approach is valid. One sensitive test is the determination of the 1s Lamb Shift in highly-charged very heavy ions. The 1s Lamb Shift of hydrogen-like lead (Pb81+) and gold (Au78+) has been determined using the novel detector concept of silicon microcalorimeters for the detection of hard X-rays. The results of (260 +- 22) eV for lead and (208 +- 13) eV for gold are within error bars in good agreement with theoretical predictions. For hydrogen-like lead, this represents the most accurate determination of the 1s Lamb Shift to our knowledge.
ISSN:2331-8422
DOI:10.48550/arxiv.1608.01479