Physics Letters B (Sep 2016)
Quadrupole moments of odd-A 53−63Mn: Onset of collectivity towards N=40
- C. Babcock,
- H. Heylen,
- M.L. Bissell,
- K. Blaum,
- P. Campbell,
- B. Cheal,
- D. Fedorov,
- R.F. Garcia Ruiz,
- W. Geithner,
- W. Gins,
- T. Day Goodacre,
- L.K. Grob,
- M. Kowalska,
- S.M. Lenzi,
- B. Maass,
- S. Malbrunot-Ettenauer,
- B. Marsh,
- R. Neugart,
- G. Neyens,
- W. Nörtershäuser,
- T. Otsuka,
- R. Rossel,
- S. Rothe,
- R. Sánchez,
- Y. Tsunoda,
- C. Wraith,
- L. Xie,
- X.F. Yang
Affiliations
- C. Babcock
- Oliver Lodge Laboratory, Oxford Street, University of Liverpool, L69 7ZE, UK
- H. Heylen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
- M.L. Bissell
- School of Physics and Astronomy, University of Manchester, M13 9PL, UK
- K. Blaum
- Max-Plank-Institut für Kernphysik, D-69117 Heidelberg, Germany
- P. Campbell
- School of Physics and Astronomy, University of Manchester, M13 9PL, UK
- B. Cheal
- Oliver Lodge Laboratory, Oxford Street, University of Liverpool, L69 7ZE, UK
- D. Fedorov
- Petersburg Nuclear Physics Institute, 188350 Gatchina, Russia
- R.F. Garcia Ruiz
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
- W. Geithner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- W. Gins
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
- T. Day Goodacre
- School of Physics and Astronomy, University of Manchester, M13 9PL, UK
- L.K. Grob
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
- M. Kowalska
- ISOLDE, CERN, CH-1211 Geneva 23, Switzerland
- S.M. Lenzi
- Dipartimento di Fisica e Astronomia dell'Università and INFN, Sezione di Padova, I-35131 Padova, Italy
- B. Maass
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
- S. Malbrunot-Ettenauer
- ISOLDE, CERN, CH-1211 Geneva 23, Switzerland
- B. Marsh
- ISOLDE, CERN, CH-1211 Geneva 23, Switzerland
- R. Neugart
- Max-Plank-Institut für Kernphysik, D-69117 Heidelberg, Germany
- G. Neyens
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
- W. Nörtershäuser
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
- T. Otsuka
- Dept. of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- R. Rossel
- ISOLDE, CERN, CH-1211 Geneva 23, Switzerland
- S. Rothe
- ISOLDE, CERN, CH-1211 Geneva 23, Switzerland
- R. Sánchez
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Y. Tsunoda
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- C. Wraith
- Oliver Lodge Laboratory, Oxford Street, University of Liverpool, L69 7ZE, UK
- L. Xie
- School of Physics and Astronomy, University of Manchester, M13 9PL, UK
- X.F. Yang
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
- DOI
- https://doi.org/10.1016/j.physletb.2016.07.016
- Journal volume & issue
-
Vol. 760,
no. C
pp. 387 – 392
Abstract
The spectroscopic quadrupole moments of the odd–even Mn isotopes between N=28 and N=38 have been measured using bunched-beam collinear laser spectroscopy at ISOLDE, CERN. In order to increase sensitivity to the quadrupole interaction, the measurements have been done using a transition in the ion rather than in the atom, with the additional advantage of better spectroscopic efficiency. Since the chosen transition is from a metastable state, optical pumping in ISOLDE's cooler and buncher (ISCOOL) was used to populate this state. The extracted quadrupole moments are compared to large-scale shell model predictions using three effective interactions, GXPF1A, LNPS and modified A3DA. The inclusion of both the 1νg9/2 and 2νd5/2 orbitals in the model space is shown to be necessary to reproduce the observed increase in the quadrupole deformation from N=36 onwards. Specifically, the inclusion of the 2νd5/2 orbital induces an increase in neutron and proton excitations across the reduced gaps at N=40 and Z=28, leading to an increase in deformation above N=36.
Keywords
