Journal
PHYSICAL REVIEW LETTERS
Volume 127, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.072502
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Funding
- Max Planck Society
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [273811115-SFB 1225]
- DFG Research UNIT FOR 2202
- NIST
- Unite Mixte de Recherche de Sorbonne Universite, de ENS-PSL Research University, du College de France et du CNRS [8552]
- Russian Minobrnauki [10]
- Allianz Program of the Helmholtz Association [EMMI HA-216]
- European Research Council (ERC) under the European Union [832848-FunI]
- International Max Planck Research School for Precision Tests of Fundamental Symmetries (IMPRS-PTFS)
- Max Planck PTB RIKEN Center for Time, Constants, and Fundamental Symmetries
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In this study, the cyclotron frequency ratio of Os-187(29+) to Re-187(29+) ions was measured with the Penning-trap mass spectrometer PENTATRAP, resulting in the most precise measurement to date. The total binding-energy difference of the 29 missing electrons in Re and Os was calculated, yielding a value of 53.5(10) eV. Finally, using the achieved results, the mass difference between neutral 187Re and Os-187, i.e., the Q value of the beta(-) decay of Re-187, was determined to be 2470.9(13) eV.
The cyclotron frequency ratio of Os-187(29+) to Re-187(29+) ions was measured with the Penning-trap mass spectrometer PENTATRAP. The achieved result of R = 1.000 000 013 882(5) is to date the most precise such measurement performed on ions. Furthermore, the total binding-energy difference of the 29 missing electrons in Re and Os was calculated by relativistic multiconfiguration methods, yielding the value of Delta E = 53.5(10) eV. Finally, using the achieved results, the mass difference between neutral 187Re and Os-187, i.e., the Q value of the beta(-) decay of Re-187, is determined to be 2470.9(13) eV.
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