Physics Letters B (Nov 2019)
Lifetime measurements of excited states in 163W and the implications for the anomalous B(E2) ratios in transitional nuclei
- M.C. Lewis,
- D.T. Joss,
- B. Sayğı,
- R.D. Page,
- D.M. Cullen,
- L. Barber,
- M.M. Giles,
- J. Simpson,
- M.A.M. Al-Aqeel,
- H. Badran,
- T. Braunroth,
- A.D. Briscoe,
- T. Calverley,
- A. Dewald,
- M. Doncel,
- T. Grahn,
- P.T. Greenlees,
- C. Henrich,
- A. Herzáň,
- R.-D. Herzberg,
- E. Higgins,
- J. Hilton,
- S. Ilieva,
- R. Julin,
- S. Juutinen,
- J. Keatings,
- T. Kröll,
- M. Labiche,
- K. Mashtakov,
- B.S. Nara Singh,
- E. Parr,
- J. Partanen,
- E.S. Paul,
- P. Rahkila,
- M. Sandzelius,
- J. Sarén,
- C. Scholey,
- M. Siciliano,
- P. Spagnoletti,
- S. Stolze,
- S.V. Szwec,
- M.J. Taylor,
- J. Uusitalo
Affiliations
- M.C. Lewis
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
- D.T. Joss
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom; Corresponding author.
- B. Sayğı
- Fizik Bölümü, Fen Fakültesi, Ege Üniversitesi, Bornova, İzmir, 35100, Turkey
- R.D. Page
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
- D.M. Cullen
- School of Physics & Astronomy, Schuster Building, The University of Manchester, Manchester M13 9PL, United Kingdom
- L. Barber
- School of Physics & Astronomy, Schuster Building, The University of Manchester, Manchester M13 9PL, United Kingdom
- M.M. Giles
- School of Physics & Astronomy, Schuster Building, The University of Manchester, Manchester M13 9PL, United Kingdom
- J. Simpson
- UKRI-STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
- M.A.M. Al-Aqeel
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom; Imam Mohammad Ibn Saud Islamic University (IMISU), Riyadh, 11623, Saudi Arabia
- H. Badran
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- T. Braunroth
- Institut für Kernphysik der Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
- A.D. Briscoe
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
- T. Calverley
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom; Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- A. Dewald
- Institut für Kernphysik der Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
- M. Doncel
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
- T. Grahn
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- P.T. Greenlees
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- C. Henrich
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
- A. Herzáň
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom; Institute of Physics, Slovak Academy of Sciences, SK-84511 Bratislava, Slovakia
- R.-D. Herzberg
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
- E. Higgins
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
- J. Hilton
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom; Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- S. Ilieva
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
- R. Julin
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- S. Juutinen
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- J. Keatings
- School of Engineering & Computing, University of the West of Scotland, Paisley, United Kingdom
- T. Kröll
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
- M. Labiche
- UKRI-STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
- K. Mashtakov
- School of Engineering & Computing, University of the West of Scotland, Paisley, United Kingdom
- B.S. Nara Singh
- School of Physics & Astronomy, Schuster Building, The University of Manchester, Manchester M13 9PL, United Kingdom; School of Engineering & Computing, University of the West of Scotland, Paisley, United Kingdom
- E. Parr
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
- J. Partanen
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- E.S. Paul
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
- P. Rahkila
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- M. Sandzelius
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- J. Sarén
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- C. Scholey
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- M. Siciliano
- INFN, Laboratori Nazionali di Legnaro, 35020 Legnaro (Padova), Italy; Irfu/CEA, Université de Paris-Saclay, 91191 Gif-sur-Yvette, France
- P. Spagnoletti
- School of Engineering & Computing, University of the West of Scotland, Paisley, United Kingdom
- S. Stolze
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- S.V. Szwec
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- M.J. Taylor
- Division of Cancer Sciences, School of Medical Sciences, The University of Manchester, Manchester, M13 9PL, United Kingdom
- J. Uusitalo
- Department of Physics, University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, Jyvaskyla, Finland
- Journal volume & issue
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Vol. 798
Abstract
This letter reports lifetime measurements of excited states in the odd-N nucleus 163W using the recoil-distance Doppler shift method to probe the core polarising effect of the i13/2 neutron orbital on the underlying soft triaxial even-even core. The ratio B(E2:21/2+→17/2+)/B(E2:17/2+→13/2+) is consistent with the predictions of the collective rotational model. The deduced B(E2) values provide insights into the validity of collective model predictions for heavy transitional nuclei and a geometric origin for the anomalous B(E2) ratios observed in nearby even-even nuclei is proposed. Keywords: Mean lifetimes, B(E2) reduced transition probabilities, Recoil-distance Doppler-shift method, Nuclear deformation, Gamma-ray Spectroscopy
