Speaker
Mohamad MOUKADDAM
(Université de Strasbourg)
Description
The Harmonic Oscillator closed shell at N=40 in 68Ni is weak and loses its strength at two proton-holes distance. This was manifested in 64,66Fe and 60,62Cr nuclei by the deformation of the low-lying states. Calculations performed in this mass region predict a new island of inversion at N=40 similar to the one discovered at N=20. Using a large valence neutron space, the neutron 1g9/2-2d5/2 gap at N=40 is shown to be a crucial ingredient for the understanding of the nuclear structure around N=40. Moreover, its measurment would definitely help to draw preliminary conclusions about the magicity of 78Ni. The neutron 1g9/2-2d5/2 energy difference has been determined in 69Ni using the neutron stripping reaction d(68Ni,p). The experiment has been performed at GANIL in inverse kinematics using the MUST2 array. Angular momenta and spectroscopic factors of the populated states (1g9/2, 2d5/2) were obtained from the comparison between the experimental differential transfer cross-sections as a function of the proton detection angle and DWBA calculations using adiabatic potentials.
Primary authors
Dr
Didier BEAUMEL
(IPN , CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France)
Dr
Gilbert DUCHENE
(Université de Strasbourg, IPHC, 23 rue du Loess 67037 Strasbourg, France and CNRS, UMR7178, 67037 Strasbourg, France)
Mohamad MOUKADDAM
(Université de Strasbourg)
Co-authors
Mr
Adrien MATTA
(IPN , CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France)
Dr
Alain GILLIBERT
(CEA Saclay, IRFU, Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France)
Dr
Alexandre OBERTELLI
(CEA Saclay, IRFU, Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France)
Dr
Beatriz FERNANDEZ-DOMINGUEZ
(GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, F-14076 Caen, France)
Dr
Christelle STODEL
(GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, F-14076 Caen, France)
Dr
Christian FINCK
(Université de Strasbourg, IPHC, 23 rue du Loess 67037 Strasbourg, France and CNRS, UMR7178, 67037 Strasbourg, France)
Dr
Dominique CURIEN
(Université de Strasbourg, IPHC, 23 rue du Loess 67037 Strasbourg, France and CNRS, UMR7178, 67037 Strasbourg, France)
Ms
Else PLLUMBI
(IPN , CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France)
Dr
Emmanuel CLEMENT
(GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, F-14076 Caen, France)
Dr
Fairouz HAMMACHE
(IPN , CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France)
Dr
Florent HAAS
(Université de Strasbourg, IPHC, 23 rue du Loess 67037 Strasbourg, France and CNRS, UMR7178, 67037 Strasbourg, France)
Dr
François DIDIERJEAN
(Université de Strasbourg, IPHC, 23 rue du Loess 67037 Strasbourg, France and CNRS, UMR7178, 67037 Strasbourg, France)
Dr
Freddy FLAVIGNY
(CEA Saclay, IRFU, Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France)
Dr
Frédéric NOWACKI
(Université de Strasbourg, IPHC, 23 rue du Loess 67037 Strasbourg, France and CNRS, UMR7178, 67037 Strasbourg, France)
Mr
Geoffroy BURGUNDER
(GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, F-14076 Caen, France)
Dr
Iolanda MATEA
(IPN , CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France)
Dr
Iulian STEFAN
(IPN , CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France)
Dr
Jacques GUILLOT
(IPN , CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France)
Dr
Jean-Antoine SCARPACI
(IPN , CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France)
Dr
Jean-Charles THOMAS
(GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, F-14076 Caen, France)
Dr
Julien GIBELIN
(LPC, CNRS-ENSI Caen, Université de Caen, Basse-Normandie, France)
Dr
Julien PANCIN
(GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, F-14076 Caen, France)
Dr
Julien PIOT
(GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, F-14076 Caen, France)
Dr
Kamila SIEJA
(Université de Strasbourg, IPHC, 23 rue du Loess 67037 Strasbourg, France and CNRS, UMR7178, 67037 Strasbourg, France)
Dr
Kirby KEMPER
(Department of Physics, Florida State University, Tallahassee, Florida 32306, USA)
Dr
Laurent NALPAS
(CEA Saclay, IRFU, Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France)
Dr
Luc PERROT
(IPN , CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France)
Dr
Lucia CACERES
(GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, F-14076 Caen, France)
Dr
Muhsin N. HARAKEH
(GSI, Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany, and KVI, University of Groningen, 9747 AA Groningen, the Netherlands)
Dr
Nicolas DE SEREVILLE
(IPN , CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France)
Dr
Olivier SORLIN
(GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, F-14076 Caen, France)
Prof.
Riccardo RAABE
(Instituut voor Kern- en Stralingsfysica, K.U. Leuven, University of Leuven, BE-3001 Leuven, Belgium)
Ms
Sandra GIRON
(IPN , CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France)
Dr
Serge FRANCHOO
(IPN , CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France)
Dr
Stéfan GREVY
(Centre d’Études Nucléaires de Bordeaux Gradignan—Université Bordeaux 1—UMR 5797 CNRS/IN2P3, Chemin du Solarium, BP 120, 33175 Gradignan, France)
Dr
Valérie LAPOUX
(CEA Saclay, IRFU, Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France)
