Erlangen 2022 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 7: MS Poster Session
MS 7.1: Poster
Mittwoch, 16. März 2022, 16:30–18:15, P
Direct high-precision measurement of the Q-value of the electron capture in 163Ho — •K. Kromer1, M. Brass2, V. Debierre2, M. Door1, H. Dorrer3, Ch.E. Düllmann3,4,5, S. Eliseev1, C. Enss6, P. Filianin1, L. Gastaldo5, Z. Harman1, M.W. Haverkort2, J. Herkenhoff1, P. Indelicato7, C.H. Keitel1, D. Lange1, Yu.N. Novikov8, D. Renisch4,5, A. Rischka1, Ch. Schweiger1, and K. Blaum1 — 1Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany — 2Institute for Theoretical Physics, Heidelberg University, 69120 Heidelberg, Germany — 3Institut für Kernchemie, Johannes-Gutenberg-Universität Mainz, 55128 Mainz, Germany — 4Helmholtz-Institut Mainz, 55128 Mainz, Germany — 5GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany — 6Kirchhoff-Institute for Physics, Heidelberg University, 69120 Heidelberg, Germany — 7Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, 75005 Paris, France — 8NRC “Kurchatov Institute”-Petersburg Nuclear Physics Institute, Gatchina 188300, Russia
Pentatrap [1] is a high-precision Penning-trap mass spectrometer featuring a stack of five Penning traps and determining mass-ratios with a relative uncertainty of below 10−11. Mass-ratio determinations of stable and long-lived highly charged ions at this level have numerous applications, among others, in neutrino physics. The ECHo collaboration [2] plans to set an upper limit on the mass of the electron neutrino by measuring the sprectrum of the electron capture decay of 163Ho with metallic magnetic calorimeters. In order to exclude systematic errors and have an independent value of the endpoint of the electron capture spectrum, Pentatrap measured the Q-value by means of Penning-trap mass spectometry, comparing the mass of highly charged ions of the mother and daughter nuclides 163Ho and 163Dy. The uncertainty of the final Q-value including binging energy calculations of the missing electrons is as low as 1.1 eV.
[1] Repp, J. et al., Appl. Phys. B 107, 983, (2012)
[2] Gastaldo, L. et al., Eur. Phys. J. ST 226, 1623 (2017)