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

• Verfasst von: Eliseev, Sergey [VerfasserIn]
• Verfasst von: Enss, Christian [VerfasserIn]
• Verfasst von: Gastaldo, Loredana [VerfasserIn]
• Titel: Direct measurement of the mass difference of 163Ho and 163Dy solves the Q-value puzzle for the neutrino mass determination
• Verf.angabe: 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
• E-Jahr: 2015
• Jahr: 5 August 2015
• Umfang: 5 S.
• Fussnoten: Die Zahl "163" ist im Titel jeweils hochgestellt ; Gesehen am 09.07.2020
• Titel Quelle: Enthalten in: Physical review letters
• Ort Quelle: College Park, Md. : APS, 1958
• Jahr Quelle: 2015
• Band/Heft Quelle: 115(2015,6) Artikel-Nummer 062501, 5 Seiten
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.115.062501
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1724147323

Abstract

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.