Speaker
Freddy Flavigny
(CEA/IRFU/SPhN)
Description
In the past 15 years, many new features of nuclear shell structure have been discovered via knockout reactions from exotic nuclei at intermediate energies. Cross sections of such processes are usually analysed using the eikonal and adiabatic approximations and give access to experimental spectroscopic factors. The parallel momentum distributions of the projectile-like residues contain information on the intrinsic angular momentum of the removed nucleon. Nevertheless, the limits of the reaction mechanism have to be well understood for a safe extraction of these quantities.
To further investigate these limits, we performed the one-neutron and one-proton removal from unstable nuclei with large asymmetry DS=Sn-Sp. Inclusive cross sections and parallel-momentum distributions were measured for incident 14O and 16C at 53 MeV/ nucleon and 75 MeV/nucleon respectively. Strong deviations from standard adiabatic predictions are observed in the case of deeply-bound nucleon removal. The corresponding parallel momentum distributions exhibit a cut-off at high energy and a strong low-energy tail. All these results will be presented and discussed in details.
Primary authors
Dr
Alexandra Gade
(NSCL)
Dr
Alexandre Obertelli
(CEA/IRFU/SPhN)
Dr
Daniel Bazin
(NSCL)
Freddy Flavigny
(CEA/IRFU/SPhN)
Dr
Laurent Nalpas
(CEA/IRFU/SPhN)
Co-authors
Dr
Alex Brown
(NSCL)
Dr
Andrew Ratkiewicz
(NSCL)
Dr
Angela Bonaccorso
(INFN Pisa)
Mrs
Corinne Louchart
(CEA/IRFU/SPhN)
Dr
Dirk Weisshaar
(NSCL)
Dr
Geof Grinyer
(NSCL)
Prof.
Jeffrey Tostevin
(University of Surrey)
Dr
Sean McDaniel
(NSCL)
Dr
Thomas Glasmacher
(NSCL)
Mr
Travis Baugher
(NSCL)
