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Mass measurements of 99–101In challenge ab initio nuclear theory of the nuclide 100Sn

Journal Article · · Nature Physics
 [1];  [2];  [1];  [3];  [4];  [5];  [2];  [6];  [7];  [5];  [8];  [9];  [9];  [10];  [11];  [12];  [6];  [13];  [14];  [5] more »;  [15];  [6];  [2];  [16];  [2];  [17] « less
  1. Max Planck Inst. fuer Kernphysik, Heidelberg (Germany); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  2. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  3. Univ. of Sydney, NSW (Australia)
  4. Université de Bordeaux, Gradignan (France)
  5. Max Planck Inst. fuer Kernphysik, Heidelberg (Germany)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  7. TRIUMF, Vancouver, BC (Canada); McGill Univ., Montreal, QC (Canada)
  8. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Center for Computational Sciences (NCCS)
  9. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  10. Université Paris-Saclay, Orsay (France)
  11. European Organization for Nuclear Research (CERN), Geneva (Switzerland); Université Paris-Saclay, Orsay (France)
  12. TRIUMF, Vancouver, BC (Canada)
  13. Universität Greifswald (Germany)
  14. Max Planck Inst. fuer Kernphysik, Heidelberg (Germany); Technische Univ. Darmstadt (Germany); GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  15. Univ. of Washington, Seattle, WA (United States)
  16. European Organization for Nuclear Research (CERN), Geneva (Switzerland); Universität Greifswald (Germany); Technische Univ. Darmstadt (Germany)
  17. Technische Universität Dresden (Germany)
+ Show Author Affiliations
The tin isotope 100Sn is of singular interest for nuclear structure due to its closed-shell proton and neutron configurations. It is also the heaviest nucleus comprising protons and neutrons in equal numbers—a feature that enhances the contribution of the short-range proton–neutron pairing interaction and strongly influences its decay via the weak interaction. Decay studies in the region of 100Sn have attempted to prove its doubly magic character but few have studied it from an ab initio theoretical perspective, and none of these has addressed the odd-proton neighbours, which are inherently more difficult to describe but crucial for a complete test of nuclear forces. Here we present direct mass measurements of the exotic odd-proton nuclide 100In, the beta-decay daughter of 100Sn, and of 99In, with one proton less than 100Sn. We use advanced mass spectrometry techniques to measure 99In, which is produced at a rate of only a few ions per second, and to resolve the ground and isomeric states in 101In. The experimental results are compared with ab initio many-body calculations. The 100-fold improvement in precision of the 100In mass value highlights a discrepancy in the atomic-mass values of 100Sn deduced from recent beta-decay results.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
Australian Research Council (ARC); European Commission (EC); German Federal Ministry of Education and Research (BMBF); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC05-00OR22725; FG02-96ER40963; FG02-97ER41014; SC0018223
OSTI ID:
1833931
Journal Information:
Nature Physics, Journal Name: Nature Physics Journal Issue: 10 Vol. 17; ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)Copyright Statement
Country of Publication:
United States
Language:
English

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