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Direct measurement of the mass difference of 163Ho and 163Dy solves the Q-value puzzle for the neutrino mass determination

The atomic mass difference of 163Ho and 163Dy has been directly measured with the Penning-trap mass spectrometer SHIPTRAP applying the novel phase-imaging ion-cyclotron-resonance technique. Our measurement has solved the long-standing problem of large discrepancies in the Q value of the electron cap...

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Bibliographic Details
Main Authors: Eliseev, Sergey (Author) , Enss, Christian (Author) , Gastaldo, Loredana (Author)
Format: Article (Journal)
Language:English
Published: 5 August 2015
In: Physical review letters
Year: 2015, Volume: 115, Issue: 6
ISSN:1079-7114
DOI:10.1103/PhysRevLett.115.062501
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.115.062501
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.115.062501
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Author Notes:S. Eliseev, K. Blaum, M. Block, S. Chenmarev, H. Dorrer, Ch.E. Düllmann, C. Enss, P.E. Filianin, L. Gastaldo, M. Goncharov, U. Köster, F. Lautenschläger, Yu. N. Novikov, A. Rischka, R.X. Schüssler, L. Schweikhard, and A. Türler
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Summary:The atomic mass difference of 163Ho and 163Dy has been directly measured with the Penning-trap mass spectrometer SHIPTRAP applying the novel phase-imaging ion-cyclotron-resonance technique. Our measurement has solved the long-standing problem of large discrepancies in the Q value of the electron capture in 163Ho determined by different techniques. Our measured mass difference shifts the current Q value of 2555(16) eV evaluated in the Atomic Mass Evaluation 2012 [G. Audi et al., Chin. Phys. C 36, 1157 (2012)] by more than 7σ to 2833(30stat)(15sys) eV/c2. With the new mass difference it will be possible, e.g., to reach in the first phase of the ECHo experiment a statistical sensitivity to the neutrino mass below 10 eV, which will reduce its present upper limit by more than an order of magnitude.
Item Description:Die Zahl "163" ist im Titel jeweils hochgestellt
Gesehen am 09.07.2020
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.115.062501

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