Nuclear-structure experiments at iThemba LABS to investigate discrepancies between (p,p′) and (γ,xn) data

Donaldson LM, Adsley P, Banu A, Bassauer S, Bastin B, Bertulani CA, Brümmer JW, Carter J, Cooper GR, Fearick RW, Förtsch SV, Fujita H, Fujita Y, Hammache F, Harakeh MN, Henderson J, Jingo M, Jivan H, Kheswa BV, Kheswa NY, Kleinig W, Kureba CO, Kvasil J, Latif M, Li KC, Meyer A, Mira JP, Nemulodi F, Nesterenko VO, von Neumann-Cosel P, Neveling R, Papka P, Pellegri L, Pietralla N, Richter A, Ponomarev VY, Rebeiro B, Reinhard PG, de Séréville N, Sideras-Haddad E, Smit FD, Smith MK, Swartz JA, Tamii A, Usman IT (2023)

Publication Type: Conference contribution

Publication year: 2023

Publisher: Institute of Physics

Book Volume: 2586

Conference Proceedings Title: Journal of Physics: Conference Series

Event location: Cape Town, ZAF

DOI: 10.1088/1742-6596/2586/1/012068

Abstract

The iThemba Laboratory for Accelerator Based Sciences (iThemba LABS) is a centre of expertise and innovation in the field of nuclear-structure physics and is a leader in several high-impact studies. One of the highlights of these nuclear-structure experiments is the study of the broad structure of the IsoVector Giant Dipole Resonance (IVGDR) in the rare-earth region. Proton inelastic scattering experiments with Ep = 200 MeV were performed on the even-even Nd isotope chain and ¹⁵²Sm at very forward scattering angles including zero degrees with the K600 magnetic spectrometer. The evolution of the shape of the IVGDR in the transition from spherical to deformed nuclei was investigated. One of the goals of this highlighted study was to confirm the K-splitting observed in previous photo-absorption measurements from Saclay. Significant discrepancies were found between the direct (γ, xn) data obtained at Saclay and the equivalent photo-absorption cross sections obtained using (p, p^′) data from the K600. Furthermore, discrepancies exist for several nuclei between photo-absorption data taken at the Saclay and Livermore laboratories. These discrepancies, possible reasons for them and future investigations will be presented and discussed.

Authors with CRIS profile

Involved external institutions

iThemba Laboratory for Accelerator Based Sciences South Africa (ZA) James Madison University (JMU) United States (USA) (US) Technische Universität Darmstadt Germany (DE) Institut national de physique nucléaire et de physique des particules (IN2P3) France (FR) Texas A&M University, Commerce United States (USA) (US) University of the Witwatersrand (WITS) South Africa (ZA) University of Cape Town (UCT) South Africa (ZA) Osaka University / 大阪大学 Japan (JP) Université Paris-Saclay France (FR) University of Groningen / Rijksuniversiteit Groningen Netherlands (NL) University of Surrey United Kingdom (GB) Joint Institute for Nuclear Research (JINR) / Объединённый институт ядерных исследований (ОИЯИ) Russian Federation (RU) Univerzita Karlova v Praze / Charles University in Prague Czech Republic (CZ) University of Stellenbosch / Universiteit van Stellenbosch South Africa (ZA) University of the Western Cape (UWC) South Africa (ZA) Michigan State University United States (USA) (US)

How to cite

APA:

Donaldson, L.M., Adsley, P., Banu, A., Bassauer, S., Bastin, B., Bertulani, C.A.,... Usman, I.T. (2023). Nuclear-structure experiments at iThemba LABS to investigate discrepancies between (p,p′) and (γ,xn) data. In Journal of Physics: Conference Series. Cape Town, ZAF: Institute of Physics.

MLA:

Donaldson, L. M., et al. "Nuclear-structure experiments at iThemba LABS to investigate discrepancies between (p,p′) and (γ,xn) data." Proceedings of the 28th International Nuclear Physics Conference, INPC 2022, Cape Town, ZAF Institute of Physics, 2023.

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