Measurement of the dipole polarizability of the unstable neutron-rich nucleus Ni68
Journal article, 2013
The E1 strength distribution in Ni68 has been investigated using Coulomb excitation in inverse kinematics at the RB3-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.
Author
D. Rossi
Helmholtz Association of German Research Centres
Johannes Gutenberg University Mainz
P. Adrich
Helmholtz Association of German Research Centres
F. Aksouh
Helmholtz Association of German Research Centres
H. Alvarez-Pol
Universidade de Santiagode Compostela
T. Aumann
Technische Universität Darmstadt
Helmholtz Association of German Research Centres
J. Benlliure
Universidade de Santiagode Compostela
M. Böhmer
Technical University of Munich
K. Boretzky
Helmholtz Association of German Research Centres
E. Casarejos
University of Vigo
M. Chartier
University of Liverpool
A. Chatillon
Helmholtz Association of German Research Centres
D. Cortina-Gil
Universidade de Santiagode Compostela
U. Datta Pramanik
Saha Institute of Nuclear Physics
H. Emling
Helmholtz Association of German Research Centres
O.V. Ershova
Goethe University Frankfurt
B. Fernandez-Dominguez
University of Liverpool
Universidade de Santiagode Compostela
H. Geissel
Helmholtz Association of German Research Centres
M. Górska
Helmholtz Association of German Research Centres
M. Heil
Helmholtz Association of German Research Centres
Håkan T Johansson
Chalmers, Applied Physics, Subatomic Physics
A.R. Junghans
Helmholtz Association of German Research Centres
A. Kelic-Heil
Helmholtz Association of German Research Centres
O.A. Kiselev
Helmholtz Association of German Research Centres
Johannes Gutenberg University Mainz
A. Klimkiewicz
Helmholtz Association of German Research Centres
Jagiellonian University in Kraków
J.V. Kratz
Johannes Gutenberg University Mainz
R. Krücken
Technical University of Munich
N. Kurz
Helmholtz Association of German Research Centres
M. Labiche
University of the West of Scotland
Daresbury Laboratory
T. Le Bleis
Institut Pluridisciplinaire Hubert Curien
Goethe University Frankfurt
Helmholtz Association of German Research Centres
R.C. Lemmon
Daresbury Laboratory
Y.A. Litvinov
Helmholtz Association of German Research Centres
K. Mahata
Helmholtz Association of German Research Centres
Bhabha Atomic Research Centre (BARC)
P. Maierbeck
Technical University of Munich
A. Movsesyan
Technische Universität Darmstadt
Thomas Nilsson
Chalmers, Applied Physics, Subatomic Physics
C. Nociforo
Helmholtz Association of German Research Centres
R. Palit
Tata Institute of Fundamental Research
S. Paschalis
University of Liverpool
Technische Universität Darmstadt
R. Plag
Goethe University Frankfurt
Helmholtz Association of German Research Centres
R. Reifarth
Helmholtz Association of German Research Centres
Goethe University Frankfurt
D. Savran
Helmholtz Association of German Research Centres
Frankfurt Institute for Advanced Studies
H. Scheit
Technische Universität Darmstadt
H. Simon
Helmholtz Association of German Research Centres
K. Sümmerer
Helmholtz Association of German Research Centres
A. Wagner
Helmholtz Association of German Research Centres
W. Walua
Jagiellonian University in Kraków
H. Weick
Helmholtz Association of German Research Centres
M. Winkler
Helmholtz Association of German Research Centres
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 111 24 242503Subject Categories (SSIF 2011)
Subatomic Physics
Physical Sciences
Roots
Basic sciences
DOI
10.1103/PhysRevLett.111.242503