Mass-Difference Measurements on Heavy Nuclides with an eV / c2 Accuracy in the PENTATRAP Spectrometer
First ever measurements of the ratios of free cyclotron frequencies of heavy, highly charged ions with Z > 50 with relative uncertainties close to 10 − 11 are presented. Such accurate measurements have become realistic due to the construction of the novel cryogenic multi-Penning-trap mass spectro...
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Veröffentlicht in: | Physical review letters 2020-03, Vol.124 (11) |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | First ever measurements of the ratios of free cyclotron frequencies of heavy, highly charged ions with Z > 50 with relative uncertainties close to 10 − 11 are presented. Such accurate measurements have become realistic due to the construction of the novel cryogenic multi-Penning-trap mass spectrometer PENTATRAP. Based on the measured frequency ratios, the mass differences of five pairs of stable xenon isotopes, ranging from 126 Xe to 134 Xe , have been determined. Moreover, the first direct measurement of an electron binding energy in a heavy highly charged ion, namely of the 37th atomic electron in xenon, with an uncertainty of a few eV is demonstrated. The obtained value agrees with the calculated one using two independent, different implementations of the multiconfiguration Dirac-Hartree-Fock method. PENTATRAP opens the door to future measurements of electron binding energies in highly charged heavy ions for more stringent tests of bound-state quantum electrodynamics in strong electromagnetic fields and for an investigation of the manifestation of light dark matter in isotopic chains of certain chemical elements. |
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ISSN: | 0031-9007 1079-7114 |
DOI: | 10.1103/PhysRevLett.124.113001 |