Mass measurements of As, Se, and Br nuclei, and their implication on the proton-neutron interaction strength toward the N=Z line

  title={Mass measurements of As, Se, and Br nuclei, and their implication on the proton-neutron interaction strength toward the 
  author={Israel Mardor and S. Ayet San Andr{\'e}s and Timo Dickel and Daler Amanbayev and S{\"o}nke Beck and J. Bergmann and Hans Geissel and L{\'a}szl{\'o} Gr{\'o}f and Emma Haettner and Christine Hornung and Nasser Kalantar-Nayestanaki and Gabriella Kripko-Koncz and Ivan Miskun and Ali Mollaebrahimi and Wolfgang R. Pla{\ss} and Christoph Scheidenberger and Helmut Weick and Soumya Bagchi and D. L. Balabanski and A. A. Bezbakh and Željko Bren{\vc}i{\'c} and Olga Charviakova and Vı́t Chudoba and Paul Constantin and Mojdeh Dehghan and A. S. Fomichev and L. V. Grigorenko and O. Hall and Mohsen Harakeh and J. P. Hucka and Anu Kankainen and O. Kiselev and R. Knobel and D. A. Kostyleva and Sergey Krupko and N. A. Kurkova and N. Kuzminchuk and Ivan G. Mukha and I. A. Muzalevskii and D. Nichita and Chiara Nociforo and Zygmunt Patyk and M. Pfutzner and S. Pietri and Sivaji Purushothaman and Moritz P. Reiter and Heidi Roesch and Federica Schirru and P. G. Sharov and Ana Spataru and Goran Stani{\'c} and Alexandru State and Y. K. Tanaka and Matja{\vz} Vencelj and Mikhail I. Yavor and J. Zhao for the Super-FRS Experiment Collaboration and Soreq Nuclear Research Center and Yavne and Israel. and Tel Aviv University and Tel Aviv and Gsi GmbH and Darmstadt and H Germany and II. Physikalisches Institut and Justus-Liebig-Universitat and Giessen and Nuclear Energy Group and Esrig and University of Groningen and Groningen and The Netherlands. and Saint Mary's University and Halifax and Canada. and Extreme Light Infrastructure-Nuclear Physics and Bucharest-Magurele and Romania. and Flerov Laboratory of Nuclear Reactions and Jinr and Dubna and Russia. and Institute of Metal Physics and Silesian University and Opava and Czech Republic and Jo{\vz}ef Stefan Institute and Ljubljana and Slovenia. and National Center for Atmospheric Research and Warszawa and Poland and National Research Centre Kurchatov Institute and Moscow and National Research Nuclear University MEPhI and University of Edinburgh and Edinburgh and United Kingdom. and Technische Universitat Darmstadt and University of Jyvaskyla and Jyvaskyla and Finland. and Doctoral School in Engineering and Applications of Lasers and Accelerators and University of Bucharest and Bucharest and Faculty of Physics and University of Warsaw and Johannes Gutenberg-Universitat and Mainz and High Energy Nuclear Physics Laboratory and Riken and Saitama and Japan. and Institute for Analytical Instrumentation and St. Petersburg},
  journal={Physical Review C},
Mass measurements of the $^{69}$As, $^{70,71}$Se and $^{71}$Br isotopes, produced via fragmentation of a $^{124}$Xe primary beam at the FRS at GSI, have been performed with the multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) of the FRS Ion Catcher with an unprecedented mass resolving power of almost 1,000,000. For the $^{69}$As isotope, this is the first direct mass measurement. A mass uncertainty of 22 keV was achieved with only 10 events. For the $^{70}$Se isotope, a mass… Expand

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