Physics Letters B (Jan 2018)
Deformation dependence of the isovector giant dipole resonance: The neodymium isotopic chain revisited
- L.M. Donaldson,
- C.A. Bertulani,
- J. Carter,
- V.O. Nesterenko,
- P. von Neumann-Cosel,
- R. Neveling,
- V.Yu. Ponomarev,
- P.-G. Reinhard,
- I.T. Usman,
- P. Adsley,
- J.W. Brummer,
- E.Z. Buthelezi,
- G.R.J. Cooper,
- R.W. Fearick,
- S.V. Förtsch,
- H. Fujita,
- Y. Fujita,
- M. Jingo,
- W. Kleinig,
- C.O. Kureba,
- J. Kvasil,
- M. Latif,
- K.C.W. Li,
- J.P. Mira,
- F. Nemulodi,
- P. Papka,
- L. Pellegri,
- N. Pietralla,
- A. Richter,
- E. Sideras-Haddad,
- F.D. Smit,
- G.F. Steyn,
- J.A. Swartz,
- A. Tamii
Affiliations
- L.M. Donaldson
- School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa
- C.A. Bertulani
- Department of Physics and Astronomy, Texas A&M University-Commerce, Commerce, TX 75429, USA
- J. Carter
- School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa
- V.O. Nesterenko
- Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia
- P. von Neumann-Cosel
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- R. Neveling
- iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
- V.Yu. Ponomarev
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- P.-G. Reinhard
- Institut für Theoretische Physik II, Universität Erlangen, D-91058 Erlangen, Germany
- I.T. Usman
- School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa
- P. Adsley
- iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
- J.W. Brummer
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
- E.Z. Buthelezi
- iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
- G.R.J. Cooper
- School of Geosciences, University of the Witwatersrand, Johannesburg 2050, South Africa
- R.W. Fearick
- Department of Physics, University of Cape Town, Rondebosch 7700, South Africa
- S.V. Förtsch
- iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
- H. Fujita
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- Y. Fujita
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- M. Jingo
- School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa
- W. Kleinig
- Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia
- C.O. Kureba
- School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa
- J. Kvasil
- Institute of Particle and Nuclear Physics, Charles University, CZ-18000, Prague 8, Czech Republic
- M. Latif
- School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa
- K.C.W. Li
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
- J.P. Mira
- iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
- F. Nemulodi
- iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
- P. Papka
- iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
- L. Pellegri
- School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa
- N. Pietralla
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- A. Richter
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- E. Sideras-Haddad
- School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa
- F.D. Smit
- iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
- G.F. Steyn
- iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
- J.A. Swartz
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
- A. Tamii
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- DOI
- https://doi.org/10.1016/j.physletb.2017.11.025
- Journal volume & issue
-
Vol. 776,
no. C
pp. 133 – 138
Abstract
Proton inelastic scattering experiments at energy Ep=200 MeV and a spectrometer scattering angle of 0° were performed on 144,146,148,150Nd and 152Sm exciting the IsoVector Giant Dipole Resonance (IVGDR). Comparison with results from photo-absorption experiments reveals a shift of resonance maxima towards higher energies for vibrational and transitional nuclei. The extracted photo-absorption cross sections in the most deformed nuclei, 150Nd and 152Sm, exhibit a pronounced asymmetry rather than a distinct double-hump structure expected as a signature of K-splitting. This behaviour may be related to the proximity of these nuclei to the critical point of the phase shape transition from vibrators to rotors with a soft quadrupole deformation potential. Self-consistent random-phase approximation (RPA) calculations using the SLy6 Skyrme force provide a relevant description of the IVGDR shapes deduced from the present data.
Keywords
- 144,146,148,150Nd,152Sm(p, p′)
- Ep=200 MeV
- θlab=0∘
- Relativistic Coulomb excitation of the IVGDR
- Comparison with photo-absorption results
- Transition from spherical to deformed nuclei
