Measurement of the Dipole Polarizability of the Unstable Neutron-Rich Nucleus Ni-68

TitleMeasurement of the Dipole Polarizability of the Unstable Neutron-Rich Nucleus Ni-68
Publication TypeJournal Article
Year of Publication2013
AuthorsRossi, D. M., P. Adrich, F. Aksouh, H. Alvarez-Pol, T. Aumann, J. Benlliure, M. Bohmer, K. Boretzky, E. Casarejos, M. Chartier, A. Chatillon, D. Cortina-Gil, U. D. Pramanik, H. Emling, O. Ershova, B. Fernandez-Dominguez, H. Geissel, M. Gorska, M. Heil, H. T. Johansson, A. Junghans, A. Kelic-Heil, O. Kiselev, A. Klimkiewicz, J. V. Kratz, R. Krucken, N. Kurz, M. Labiche, T. Le Bleis, R. Lemmon, Y. A. Litvinov, K. Mahata, P. Maierbeck, A. Movsesyan, T. Nilsson, C. Nociforo, R. Palit, S. Paschalis, R. Plag, R. Reifarth, D. Savran, H. Scheit, H. Simon, K. Summerer, A. Wagner, W. Walus, H. Weick, and M. Winkler
JournalPhysical Review Letters
Volume111
Issue24
Date PublishedDec
ISBN Number0031-9007
Accession NumberWOS:000328699400005
AbstractThe E1 strength distribution in Ni-68 has been investigated using Coulomb excitation in inverse kinematics at the (RB)-B-3-LAND setup and by measuring the invariant mass in the one-and two-neutron decay channels. The giant dipole resonance and a low-lying peak (pygmy dipole resonance) have been observed at 17.1(2) and 9.55(17) MeV, respectively. The measured dipole polarizability is compared to relativistic random phase approximation calculations yielding a neutron-skin thickness of 0.17(2) fm. A method and analysis applicable to neutron-rich nuclei has been developed, allowing for a precise determination of neutron skins in nuclei as a function of neutron excess.
URL<Go to ISI>://WOS:000328699400005
DOI10.1103/PhysRevLett.111.242503
Short TitleMeasurement of the Dipole Polarizability of the Unstable Neutron-Rich Nucleus Ni-68
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