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

Mougeot, M.; Atanasov, D.; Karthein, J.; Wolf, R. N.; Ascher, P.; Blaum, K.; Chrysalidis, K.; Hagen, Gaute; Holt, J. D.; Huang, W. J.; Jansen, Gustav R.; Kulikov, I.; Litvinov, Yu. A.; Lunney, D.; Manea, V.; Miyagi, T.; Papenbrock, Thomas F.; Schweikhard, L.; Schwenk, A.; Steinsberger, T.; Stroberg, S. R.; Sun, Zhong Hao; Welker, A.; Wienholtz, F.; Wilkins, S. G.; Zuber, K.

doi:10.1038/s41567-021-01326-9

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

Journal Article · Thu Sep 23 00:00:00 EDT 2021 · Nature Physics

DOI:https://doi.org/10.1038/s41567-021-01326-9· OSTI ID:1833931

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Max Planck Inst. fuer Kernphysik, Heidelberg (Germany); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
European Organization for Nuclear Research (CERN), Geneva (Switzerland)
Univ. of Sydney, NSW (Australia)
Université de Bordeaux, Gradignan (France)
Max Planck Inst. fuer Kernphysik, Heidelberg (Germany)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
TRIUMF, Vancouver, BC (Canada); McGill Univ., Montreal, QC (Canada)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Center for Computational Sciences (NCCS)
GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
Université Paris-Saclay, Orsay (France)
European Organization for Nuclear Research (CERN), Geneva (Switzerland); Université Paris-Saclay, Orsay (France)
TRIUMF, Vancouver, BC (Canada)
Universität Greifswald (Germany)
Max Planck Inst. fuer Kernphysik, Heidelberg (Germany); Technische Univ. Darmstadt (Germany); GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
Univ. of Washington, Seattle, WA (United States)
European Organization for Nuclear Research (CERN), Geneva (Switzerland); Universität Greifswald (Germany); Technische Univ. Darmstadt (Germany)
Technische Universität Dresden (Germany)

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.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); European Commission (EC); German Federal Ministry of Education and Research (BMBF); Australian Research Council (ARC)

Grant/Contract Number:: AC05-00OR22725; FG02-96ER40963; FG02-97ER41014; SC0018223; 682841; 654002; 05P15ODCIA; 05P15HGCIA; 05P18HGCIA; 05P18RDFN1; 05E12CHA; DE190101137

OSTI ID:: 1833931

Journal Information:: Nature Physics, Vol. 17, Issue 10; ISSN 1745-2473

Publisher:: Nature Publishing Group (NPG)Copyright Statement

Country of Publication:: United States

Language:: English

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

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