Imperial College London
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ProfessorRichardThompson

Faculty of Natural Sciences, Department of Physics

Professor of Experimental Physics
 
 
 
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Contact

 

+44 (0)20 7594 3606r.thompson Website CV

 
 
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Assistant

 

Ms Judith Baylis +44 (0)20 7594 7713

 
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Location

 

620Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ullmann:2017:10.1038/ncomms15484,
author = {Ullmann, J and Andelkovic, Z and Brandau, C and Dax, A and Geithner, W and Geppert, C and Gorges, C and Hammen, M and Hannen, V and Kaufmann, S and Konig, K and Litvinov, YA and Lochmann, M and Maass, B and Meisner, J and Murbock, T and Sanchez, R and Schmidt, M and Schmidt, S and Steck, M and Stohlker, T and Thompson, RC and Trageser, C and Vollbrecht, J and Weinheimer, C and Nortershauser, W},
doi = {10.1038/ncomms15484},
journal = {Nature Communications},
title = {High precision hyperfine measurements in Bismuth challenge bound-state strong-field QED},
url = {http://dx.doi.org/10.1038/ncomms15484},
volume = {8},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Electrons bound in highly charged heavy ions such as hydrogen-like bismuth 209Bi82+ experience electromagnetic fields that are a million times stronger than in light atoms. Measuring the wavelength of light emitted and absorbed by these ions is therefore a sensitive testing ground for quantum electrodynamical (QED) effects and especially the electron–nucleus interaction under such extreme conditions. However, insufficient knowledge of the nuclear structure has prevented a rigorous test of strong-field QED. Here we present a measurement of the so-called specific difference between the hyperfine splittings in hydrogen-like and lithium-like bismuth 209Bi82+,80+ with a precision that is improved by more than an order of magnitude. Even though this quantity is believed to be largely insensitive to nuclear structure and therefore the most decisive test of QED in the strong magnetic field regime, we find a 7-σ discrepancy compared with the theoretical prediction.
AU  - Ullmann,J
AU  - Andelkovic,Z
AU  - Brandau,C
AU  - Dax,A
AU  - Geithner,W
AU  - Geppert,C
AU  - Gorges,C
AU  - Hammen,M
AU  - Hannen,V
AU  - Kaufmann,S
AU  - Konig,K
AU  - Litvinov,YA
AU  - Lochmann,M
AU  - Maass,B
AU  - Meisner,J
AU  - Murbock,T
AU  - Sanchez,R
AU  - Schmidt,M
AU  - Schmidt,S
AU  - Steck,M
AU  - Stohlker,T
AU  - Thompson,RC
AU  - Trageser,C
AU  - Vollbrecht,J
AU  - Weinheimer,C
AU  - Nortershauser,W
DO  - 10.1038/ncomms15484
PY  - 2017///
SN  - 2041-1723
TI  - High precision hyperfine measurements in Bismuth challenge bound-state strong-field QED
T2  - Nature Communications
UR  - http://dx.doi.org/10.1038/ncomms15484
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000401406100001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/49098
VL  - 8
ER  -
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