Dawning of the N=32 Shell Closure Seen through Precision Mass Measurements of Neutron-Rich Titanium Isotopes.

Autor: Leistenschneider E; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada., Reiter MP; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany., Ayet San Andrés S; II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany.; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany., Kootte B; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada., Holt JD; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Navrátil P; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Babcock C; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Barbieri C; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom., Barquest BR; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Bergmann J; II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany., Bollig J; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Ruprecht-Karls-Universität Heidelberg, D-69117 Heidelberg, Germany., Brunner T; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Physics Department, McGill University, H3A 2T8 Montréal, Québec, Canada., Dunling E; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics, University of York, York YO10 5DD, United Kingdom., Finlay A; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada., Geissel H; II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany.; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany., Graham L; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Greiner F; II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany., Hergert H; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824,USA., Hornung C; II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany., Jesch C; II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany., Klawitter R; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Max-Planck-Institut für Kernphysik, Heidelberg D-69117, Germany., Lan Y; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada., Lascar D; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Leach KG; Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA., Lippert W; II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany., McKay JE; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia V8P 5C2, Canada., Paul SF; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Ruprecht-Karls-Universität Heidelberg, D-69117 Heidelberg, Germany., Schwenk A; Max-Planck-Institut für Kernphysik, Heidelberg D-69117, Germany.; Institut für Kerphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.; ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany., Short D; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada., Simonis J; Institut für Kernphysik and PRISMA Cluster of Excellence, Johannes Gutenberg-Universität, 55099 Mainz, Germany., Somà V; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France., Steinbrügge R; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Stroberg SR; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Reed College, Portland, Oregon 97202, USA., Thompson R; Department of Physics and Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada., Wieser ME; Department of Physics and Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada., Will C; II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany., Yavor M; Institute for Analytical Instrumentation, Russian Academy of Sciences, 190103 St. Petersburg, Russia., Andreoiu C; Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada., Dickel T; II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany.; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany., Dillmann I; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia V8P 5C2, Canada., Gwinner G; Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada., Plaß WR; II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany.; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany., Scheidenberger C; II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany.; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany., Kwiatkowski AA; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia V8P 5C2, Canada., Dilling J; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2018 Feb 09; Vol. 120 (6), pp. 062503.
DOI: 10.1103/PhysRevLett.120.062503
Abstrakt: A precision mass investigation of the neutron-rich titanium isotopes ^{51-55}Ti was performed at TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). The range of the measurements covers the N=32 shell closure, and the overall uncertainties of the ^{52-55}Ti mass values were significantly reduced. Our results conclusively establish the existence of the weak shell effect at N=32, narrowing down the abrupt onset of this shell closure. Our data were compared with state-of-the-art ab initio shell model calculations which, despite very successfully describing where the N=32 shell gap is strong, overpredict its strength and extent in titanium and heavier isotones. These measurements also represent the first scientific results of TITAN using the newly commissioned multiple-reflection time-of-flight mass spectrometer, substantiated by independent measurements from TITAN's Penning trap mass spectrometer.
Databáze: MEDLINE
Externí odkaz: