Source:http://linkedlifedata.com/resource/pubmed/id/17930432
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
11
|
| pubmed:dateCreated |
2007-10-12
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| pubmed:abstractText |
We report wavelength measurements of H-like and He-like ions obtained with a novel x-ray spectrometer at the Heidelberg Electron Beam Ion Trap. The experimental uncertainty for the Lyman-alpha1 wavelength in Cl16+ is reduced by a factor of 3 and, as expected, excellent agreement with theory is maintained. For the resonance line in He-like Ar16+, an uncertainty of only deltalambda/lambda=2x10(-6) was achieved. This is the most precise x-ray wavelength reported for highly charged ions to date, and allows to test recent predictions on QED two-electron and two-photon radiative corrections for He-like ions. The results also point to the advantages of establishing absolute x-ray wavelength standards using Lyman-alpha transitions (in the present case Ar17+ Lyman-alpha1) to supersede the current ones.
|
| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
|
| pubmed:month |
Sep
|
| pubmed:issn |
0031-9007
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| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:day |
14
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| pubmed:volume |
99
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| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
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| pubmed:pagination |
113001
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| pubmed:year |
2007
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| pubmed:articleTitle |
Testing QED screening and two-loop contributions with He-Like ions.
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| pubmed:affiliation |
Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany. hbruhns@astro.columbia.edu
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| pubmed:publicationType |
Journal Article
|