@article{1df5ab38898a4249aaf4813c521b579c,
title = "Direct high-precision mass spectrometry of superheavy elements with SHIPTRAP",
abstract = "Direct mass measurements in the region of the heaviest elements were performed with the Penning-trap mass spectrometer SHIPTRAP at GSI Darmstadt. Utilizing the phase-imaging ion-cyclotron-resonance mass-spectrometry technique, the atomic masses of No251 (Z=102), Lr254 (Z=103), and Rf257 (Z=104) available at rates down to one detected ion per day were determined directly for the first time. The ground-state masses of No254 and Lr255,256 were improved by more than one order of magnitude. Relative statistical uncertainties as low as δm/m≈10-9 were achieved. Mass resolving powers of 11 000 000 allowed resolving long-lived low-lying isomeric states from their respective ground states in No251,254 and Lr254,255. This provided an unambiguous determination of the binding energies for odd-A and odd-odd nuclides previously determined only indirectly from decay spectroscopy.",
author = "O. Kaleja and B. Andelic and O. Bezrodnova and K. Blaum and M. Block and S. Chenmarev and P. Chhetri and C. Droese and D{\"u}llmann, {Ch E.} and M. Eibach and S. Eliseev and J. Even and P. Filianin and F. Giacoppo and S. G{\"o}tz and Yu Gusev and Guti{\'e}rrez, {M. J.} and He{\ss}berger, {F. P.} and N. Kalantar-Nayestanaki and {Van De Laar}, {J. J.W.} and M. Laatiaoui and S. Lohse and N. Martynova and {Minaya Ramirez}, E. and Mistry, {A. K.} and T. Murb{\"o}ck and Yu Novikov and S. Raeder and D. Rodr{\'i}guez and F. Schneider and L. Schweikhard and Thirolf, {P. G.} and A. Yakushev",
note = "Funding Information: This article comprises results of the doctoral theses of O. Kaleja and B. An{\d}eli{\'c} and is based on data obtained during online beam times in 2018 and offline measurements up to 2019 to study the systematic uncertainties. This experiment was carried out as part of FAIR-Phase-0 at the beam line Y7/SHIP at the GSI Helmholtzzentrum f{\"u}r Schwerionenforschung, Darmstadt, Germany. We thank the GSI ion source and accelerator staff for providing intense ion beams. In addition, we thank D. Racano, H.-G. Burkhard, and J. Maurer (GSI) for their supportive engineering work. We acknowledge financial support by the German BMBF (Grants No. 05P15HGFNA, No. 05P19HGFNA, No. 05P21HGFN1, No. 05P15UMFNA, and No. 05P21UMFN1) and the Max-Planck Society. J.E. gratefully acknowledges financial support through NWO-natuurkunde Projectruimte grant (Project No. 680-91-103) and support from the Rosalind Franklin Fellowship program partly financed by the European Commission under Marie Sklodowska-Curie Action FP7 MSC COFUND scheme. M.L. acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (Grant Agreement No. 819957). D.R. and M.G. acknowledge support from the Spanish MICINN (Project No. FPA2015-67694-P and PID2019-104093GB-I00/AEI/10.01339/501100011033). We acknowledge M. Wang and W. Huang from the Institute of Modern Physics, Chinese Academy of Sciences in Lanzhou, China, for their atomic mass evaluation. Publisher Copyright: {\textcopyright} 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society.",
year = "2022",
month = nov,
doi = "10.1103/PhysRevC.106.054325",
language = "English",
volume = "106",
journal = "Physical Review C",
issn = "2469-9985",
publisher = "AMER PHYSICAL SOC",
number = "5",
}