Physics Letters B (Oct 2020)
Observation of the 02+ and γ bands in 98Ru, and shape coexistence in the Ru isotopes
- P.E. Garrett,
- L. Makhathini,
- R.A. Bark,
- T.R. Rodríguez,
- S. Valbuena,
- V. Bildstein,
- T.D. Bucher,
- C. Burbadge,
- R. Dubey,
- T. Faestermann,
- R. Hertenberger,
- M. Kamil,
- E.A. Lawrie,
- K.G. Leach,
- A.D. MacLean,
- C. Mehl,
- S.H. Mthembu,
- N.J. Mukwevho,
- C. Ngwetsheni,
- S.S. Ntshangase,
- J.C. Nzobadila Ondze,
- J.N. Orce,
- B. Rebeiro,
- B. Singh,
- S. Triambak,
- E.C. Vyfers,
- H.-F. Wirth
Affiliations
- P.E. Garrett
- Department of Physics, University of Guelph, Guelph, ON, N1G2W1 Canada; Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa; Corresponding author.
- L. Makhathini
- iThemba LABS, National Research Foundation, P.O. Box 722, Somerset West 7129, South Africa; Department of Physics, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
- R.A. Bark
- iThemba LABS, National Research Foundation, P.O. Box 722, Somerset West 7129, South Africa
- T.R. Rodríguez
- Departamento de Física Teórica and CIAFF, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
- S. Valbuena
- Department of Physics, University of Guelph, Guelph, ON, N1G2W1 Canada
- V. Bildstein
- Department of Physics, University of Guelph, Guelph, ON, N1G2W1 Canada
- T.D. Bucher
- iThemba LABS, National Research Foundation, P.O. Box 722, Somerset West 7129, South Africa; Department of Physics, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
- C. Burbadge
- Department of Physics, University of Guelph, Guelph, ON, N1G2W1 Canada
- R. Dubey
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa
- T. Faestermann
- Physik Department, Technische Universität München, D-85748 Garching, Germany
- R. Hertenberger
- Fakultät für Physik, Ludwig-Maximilians-Universität München, D-85748 Garching, Germany
- M. Kamil
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa
- E.A. Lawrie
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa; iThemba LABS, National Research Foundation, P.O. Box 722, Somerset West 7129, South Africa
- K.G. Leach
- Department of Physics, Colorado School of Mines, 1523 Illinois St., Golden, CO 80401, USA
- A.D. MacLean
- Department of Physics, University of Guelph, Guelph, ON, N1G2W1 Canada
- C. Mehl
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa
- S.H. Mthembu
- iThemba LABS, National Research Foundation, P.O. Box 722, Somerset West 7129, South Africa; Department of Physics, University of Zululand, KwaDlangezwa 3886, South Africa
- N.J. Mukwevho
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa
- C. Ngwetsheni
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa
- S.S. Ntshangase
- Department of Physics, University of Zululand, KwaDlangezwa 3886, South Africa
- J.C. Nzobadila Ondze
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa
- J.N. Orce
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa
- B. Rebeiro
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa
- B. Singh
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa
- S. Triambak
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa
- E.C. Vyfers
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa
- H.-F. Wirth
- Fakultät für Physik, Ludwig-Maximilians-Universität München, D-85748 Garching, Germany
- Journal volume & issue
-
Vol. 809
p. 135762
Abstract
Excited states in 98Ru were investigated using γ-ray spectroscopy following the β-decay of 98Rh, and via the 100Ru(p,t) reaction. Combining the results from the two experiments, two states were revised to have spin-parity of 4+ and subsequently assigned to the 02+ and “γ” bands, respectively. The observed structures in 98Ru are suggested to be deformed and rotational, rather than spherical and vibrational, and fit well into the systematics of these excitations in the Ru isotopes. The 02+ excitation is suggested as a shape coexisting configuration. This observation eliminates some of the last remaining candidates for nearly harmonic vibrational nuclei in the Z≈50 region. Beyond-mean-field calculations are presented that support shape coexistence throughout the Ru isotopes with N=52–62, and suggest a smooth evolution of the shapes.
