Shape coexistence in 94Zr studied via Coulomb excitation

Naomi Marchini*, Marco Rocchini, Adriana Nannini, Daniel T. Doherty, Magdalena Zielińska, Paul E. Garrett, Katarzyna Hadyńska-Klȩk, Dmitry Testov, Alain Goasduff, Giovanna Benzoni, Franco Camera, Samuel D. Bakes, D. Bazzacco, Andreas Bergmaier, Thomas Berry, Harris Bidaman, Vinzenz Bildstein, Daniele Brugnara, Vincent H. Brunet, Wilton N. CatfordMatteo De Rizzo, Alejandra Diaz Varela, Thomas Fäestermann, Franco Galtarossa, Nicla Gelli, Andrea Gottardo, Andrea Gozzellino, Ralf Hertenberger, Andres Illana, James Keatings, Adam R.L. Kennington, Daniele Mengoni, Lisa Morrison, Daniel R. Napoli, Marco Ottanelli, Giorgia Pasqualato, Francesco Recchia, Serena Riccetto, Marcus Scheck, Marco Siciliano, Giovanni Sighinolfi, Jacqueline Sinclair, Pietro Spagnoletti, José J. Valiente Dobón, Marine Vandebrouck, Katarzyna Wrzosek-Lipska, Irene Zanon

*Corresponding author for this work

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In recent years, a number of both theoretical and experimental investigations have been performed focusing on the zirconium isotopic chain. In particular, state-of-the-art Monte Carlo shell-model calculations predict shape coexistence in these isotopes. In this context, the 94Zr nucleus, which is believed to possess a nearly spherical ground state, is particularly interesting since the purported deformed structure is basedon the low-lying 02+ state, making it amenable for detailed study. In order to provide definitive conclusionson the shapes of the low-lying states, two complementary experiments to study 94Zr by means of low-energy Coulomb excitation were performed. This data will allow the quadrupole moments of the 21,2+ levels to be extracted as well as for the deformation parameters of the 01,2+ states to be determined and, thus, definitive conclusions to be drawn on the role of shape coexistence in this nucleus for the first time.

The first experiment was performed at the INFN Legnaro National Laboratory with the GALILEO-SPIDER setup, which, for the first time, was coupled with 6 lanthanum bromide scintillators (LaBr3:Ce) in order to maximize the γ-ray detection effciency. The second experiment was performed at the Maier-Leibnitz Laboratory (MLL) in Munich and used a Q3D magnetic spectrograph to detect the scattered 12C ions following Coulomb excitation of 94Zr targets.
Original languageEnglish
Article number01038
Number of pages4
JournalEPJ Web of Conferences
Publication statusPublished - 4 Dec 2019


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