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Joey O'Neill

My publications


P Čolović, S Szilner, A Illana, J. J Valiente-Dobón, L Corradi, G Pollarolo, T Mijatović, A Goasduff, G Benzoni, M. J.G Borge, A Boso, A Boukhari, S Ceruti, J. G Cubiss, G De Angelis, H De Witte, E Fioretto, Ch Fransen, F Galtarossa, L. P Gaffney, E Giannopoulos, H Hess, M. L Jurado-Gomez, L Kaya, Th Kröll, T Marchi, R Menegazzo, D Mengoni, D. R Napoli, G O'Neill, J Pakarinen, Zs Podolyák, F Recchia, P Reiter, D Rosiak, J Snall, P Spagnoletti, D Testov, S Thiel, N Warr, ZSOLT PODOLYAK, R Zidarova (2020)Population of lead isotopes in binary reactions using a Rb 94 radioactive beam, In: Physical Review. C102(5)
We measured absolute cross sections for neutron transfer channels populated in the Rb94+Pb208 binary reaction. Cross sections have been extracted identifying directly the lead isotopes with the high efficiency MINIBALL γ-ray array coupled to a particle detector combined with a radioactive Rb94 beam delivered at Elab=6.2 MeV/nucleon by the HIE-ISOLDE facility. We observed sizable cross sections in the neutron-rich mass region, where the heavy partner acquires neutrons. A fair agreement between the measured cross sections with those from GRAZING calculations gives confidence in the cross-section predictions of more neutron-rich nuclei produced via a larger number of transferred nucleons.
L Morrison, K Hadyńska-Klek, Zs Podolyák, D. T Doherty, L. P Gaffney, L Kaya, L Próchniak, J Samorajczyk-Pyśk, J Srebrny, T Berry, A Boukhari, M Brunet, R Canavan, R Catherall, S. J Colosimo, J. G Cubiss, H De Witte, Ch Fransen, E Giannopoulos, T Kröll, H Hess, N Lalović, B Marsh, Y. Martinez Palenzuela, P. J Napiorkowski, G O'Neill, J Pakarinen, J. P Ramos, P Reiter, J. A Rodriguez, D Rosiak, S Rothe, M Rudigier, M Siciliano, J Snäll, P Spagnoletti, S Thiel, N Warr, F Wenander, R Zidarova, ZSOLT PODOLYAK, M Zielińska (2020)Quadrupole deformation of Xe 130 measured in a Coulomb-excitation experiment, In: Physical Review. C102054304
Low-lying states in the isotope Xe130 were populated in a Coulomb-excitation experiment performed at CERN's HIE-ISOLDE facility. The magnitudes and relative signs of seven E2 matrix elements and one M1 matrix element coupling five low-lying states in Xe130 were determined using the semiclassical coupled-channel Coulomb-excitation least-squares search code gosia. The diagonal E2 matrix elements of both the 21+ and 41+ states were extracted for the first time. The reduced transition strengths are in line with those obtained from previous measurements. Experimental results were compared with the general Bohr Hamiltonian with the microscopic input from mean-field theory utilizing universal nuclear energy density functional (UNEDF0), shell-model calculations using the GCN50:82 and SN100PN interactions, and simple phenomenological models (Davydov-Filippov and γ-soft). The extracted shape parameters indicate triaxial-prolate deformation in the ground-state band. In general, good agreement between theoretical predictions and experimental values was found, while neither phenomenological model was found to provide an adequate description of Xe130.