Speaker
Simon BOISSINOT
(CEA-Saclay IRFU/SPhN)
Description
The studies of the structure and the spectroscopy of neutron-rich nuclei are important for our understanding of the evolution of the nuclear structure towards the drip-line. They have shown that the shell model picture established in the valley of stability is modified, and that local magic numbers may appear.
Low-lying resonances or new magic shells represent stringent tests for the nuclear theories and their modeling of the nuclear interaction. The exotic nuclei have few or no bound excited states so the influence of continuum states adds a new challenge for theoretical calculations.
These effects can be investigated in the case of the last bound O isotope,
associated to the new magic shell gap created at N=16 : oxygen-24.
To explore its spectroscopy, we have measured at RIKEN the proton (p,p') scattering reactions at 263 MeV/n on the BigRIPS line, using the unique intensity of the RIBF 24O beam, and the state-of-the-art charged particle detector MUST2. Via the missing mass method the excitation energy spectrum of the 24O was deduced. The spectra for the contaminants (25F and 23O) will also be presented.
The talk will explain the specific methods for the extraction of the position of the states, in the case of the spectra of low statistics.
The experimental results will be compared to the microscopic calculations recently developed to take into account explicitly the treatment of the continuum-coupling and of the 3-body forces.
Primary authors
Dr
Hideaki OTSU
(RIKEN Nishina Center)
Simon BOISSINOT
(CEA-Saclay IRFU/SPhN)
Dr
Valérie LAPOUX
(CEA-Saclay IRFU/SPhN)
Co-authors
Dr
A. MATTA
(IPN Orsay IN2P3-CNRS)
Dr
A. OBERTELLI
(CEA-Saclay IRFU/SPhN)
Dr
A. YOSHIDA
(RIKEN Nishina Center)
Ms
C. LOUCHART
(CEA-Saclay IRFU/SPhN)
Dr
Ch. HOUARNER
(GANIL)
Dr
D. KAMEDA
(RIKEN Nishina Center)
Dr
E. RINDEL
(IPN Orsay IN2P3-CNRS)
Dr
E.C. POLLACCO
(CEA-Saclay IRFU/SPhN)
Dr
E.Yu. NIKOLSKII
(RIKEN Nishina Center and Kurchatov Institute)
Dr
F. FLAVIGNY
(CEA-Saclay IRFU/SPhN)
Dr
F. HAMMACHE
(IPN Orsay IN2P3-CNRS)
Dr
F. SAILLANT
(GANIL)
Dr
H. BABA
(RIKEN Nishina Center)
Dr
H. SAKURAI
(RIKEN Nishina Center)
Dr
J.F. LIBIN
(GANIL)
Dr
K. YONEDA
(RIKEN Nishina Center)
Dr
K. YOSHIDA
(RIKEN Nishina Center)
Dr
L. NALPAS
(CEA-Saclay IRFU/SPhN)
Dr
M. MATSUSHITA
(RIKEN Nishina Center)
Dr
M. NISHIMURA
(RIKEN Nishina Center)
Dr
M. TAKECHI
(RIKEN Nishina Center)
Dr
N. FUKUDA
(RIKEN Nishina Center)
Dr
N. INABE
(RIKEN Nishina Center)
Dr
P. GANGNANT
(GANIL)
Dr
Ph. ROSIER
(IPN Orsay IN2P3-CNRS)
Mr
R.J. CHEN
(RIKEN Nishina Center)
Dr
S. FRANCHOO
(IPN Orsay IN2P3-CNRS)
Dr
S. TAKEUCHI
(RIKEN Nishina Center)
Dr
T. MOTOBAYASHI
(RIKEN Nishina Center)
Dr
T. ONISHI
(RIKEN Nishina Center)
Dr
Y. BLUMENFELD
(IPN Orsay IN2P3-CNRS)
Dr
Y. TOGANO
(RIKEN Nishina Center)
