Deformation dependence of the isovector giant dipole resonance: The neodymium isotopic chain revisited

Donaldson LM, Bertulani CA, Carter J, Nesterenko VO, Von Neumann-Cosel P, Neveling R, Ponomarev VY, Reinhard PG, Usman IT, Adsley P, Brummer JW, Buthelezib EZ, Cooper GRJ, Fearick RW, Fortsch SV, Fujita H, Fujita Y, Jingo M, Kleinig W, Kureba CO, Kvasil J, Latif M, Li KCW, Mira JP, Nemulodi F, Papka P, Pellegri L, Pietralla N, Richter A, Sideras-Haddad E, Smit FD, Steyn GF, Swartz JA, Tamii A (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Physics Letters B Elsevier

Book Volume: 776

Pages Range: 133-138

DOI: 10.1016/j.physletb.2017.11.025

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.

Authors with CRIS profile

Paul-Gerhard Reinhard Naturwissenschaftliche Fakultät

Involved external institutions

University of the Witwatersrand (WITS) ZA South Africa (ZA) Texas A&M University, Commerce US United States (USA) (US) Joint Institute for Nuclear Research (JINR) / Объединённый институт ядерных исследований (ОИЯИ) RU Russian Federation (RU) Technische Universität Darmstadt DE Germany (DE) iThemba Laboratory for Accelerator Based Sciences ZA South Africa (ZA) University of Stellenbosch / Universiteit van Stellenbosch ZA South Africa (ZA) University of Cape Town (UCT) ZA South Africa (ZA) Osaka University / 大阪大学 JP Japan (JP) Univerzita Karlova v Praze / Charles University in Prague CZ Czech Republic (CZ)

How to cite

APA:

Donaldson, L.M., Bertulani, C.A., Carter, J., Nesterenko, V.O., Von Neumann-Cosel, P., Neveling, R.,... Tamii, A. (2018). Deformation dependence of the isovector giant dipole resonance: The neodymium isotopic chain revisited. Physics Letters B, 776, 133-138. https://doi.org/10.1016/j.physletb.2017.11.025

MLA:

Donaldson, L. M., et al. "Deformation dependence of the isovector giant dipole resonance: The neodymium isotopic chain revisited." Physics Letters B 776 (2018): 133-138.

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