6533b85bfe1ef96bd12bbe79
RESEARCH PRODUCT
Precise determination of the 1s Lamb shift in hydrogen-like lead and gold using microcalorimeters
S. IlievaO. KiselevD. MccammonJ. MeierA. EchlerCaroline A. KilbourneP. ScholzS. Kraft-bermuthP. GrabitzAlexander BleilePeter EgelhofV. A. Andrianovsubject
PhysicsHydrogenSiliconAtomic Physics (physics.atom-ph)010308 nuclear & particles physicsDetectorFOS: Physical scienceschemistry.chemical_elementCondensed Matter Physics01 natural sciencesAtomic and Molecular Physics and OpticsPhysics - Atomic PhysicsIonLamb shiftchemistry0103 physical sciencesCoulombElectric potentialAtomic physics010306 general physicsSpectroscopydescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-08-04 | Journal of Physics B: Atomic, Molecular and Optical Physics |