Physics Letters B (Oct 2020)
Electromagnetic properties of 21O for benchmarking nuclear Hamiltonians
- S. Heil,
- M. Petri,
- K. Vobig,
- D. Bazin,
- J. Belarge,
- P. Bender,
- B.A. Brown,
- R. Elder,
- B. Elman,
- A. Gade,
- T. Haylett,
- J.D. Holt,
- T. Hüther,
- A. Hufnagel,
- H. Iwasaki,
- N. Kobayashi,
- C. Loelius,
- B. Longfellow,
- E. Lunderberg,
- M. Mathy,
- J. Menéndez,
- S. Paschalis,
- R. Roth,
- A. Schwenk,
- J. Simonis,
- I. Syndikus,
- D. Weisshaar,
- K. Whitmore
Affiliations
- S. Heil
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- M. Petri
- Department of Physics, University of York, Heslington, York, YO10 5DD, UK; Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; Corresponding author at: Department of Physics, University of York, Heslington, York, YO10 5DD, UK.
- K. Vobig
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- D. Bazin
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- J. Belarge
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- P. Bender
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics, University of Massachusetts Lowell, Lowell, MA 01854, USA
- B.A. Brown
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- R. Elder
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- B. Elman
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- A. Gade
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- T. Haylett
- Department of Physics, University of York, Heslington, York, YO10 5DD, UK
- J.D. Holt
- TRIUMF 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- T. Hüther
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- A. Hufnagel
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- H. Iwasaki
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- N. Kobayashi
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- C. Loelius
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- B. Longfellow
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- E. Lunderberg
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- M. Mathy
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- J. Menéndez
- Center for Nuclear Study, The University of Tokyo, Tokyo, Japan
- S. Paschalis
- Department of Physics, University of York, Heslington, York, YO10 5DD, UK
- R. Roth
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- A. Schwenk
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany; Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
- J. Simonis
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- I. Syndikus
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- D. Weisshaar
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- K. Whitmore
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- Journal volume & issue
-
Vol. 809
p. 135678
Abstract
The structure of exotic nuclei provides valuable tests for state-of-the-art nuclear theory. In particular electromagnetic transition rates are more sensitive to aspects of nuclear forces and many-body physics than excitation energies alone. We report the first lifetime measurement of excited states in 21O, finding τ1/2+=420−32+35(stat)−12+34(sys) ps. This result together with the deduced level scheme and branching ratio of several γ-ray decays are compared to both phenomenological shell-model and ab initio calculations based on two- and three-nucleon forces derived from chiral effective field theory. We find that the electric quadrupole reduced transition probability of B(E2;1/2+→5/2g.s.+)=0.71−0.06−0.06+0.07+0.02 e2fm4, derived from the lifetime of the 1/2+ state, is smaller than the phenomenological result where standard effective charges are employed, suggesting the need for modifications of the latter in neutron-rich oxygen isotopes. We compare this result to both large-space and valence-space ab initio calculations, and by using multiple input interactions we explore the sensitivity of this observable to underlying details of nuclear forces.
