Study of Ground State Wave-function of the Neutron-rich 29,30Na Isotopes through Coulomb Breakup

A Rahaman,U Datta Pramanik,T Aumann,S Beceiro,K Boretzky,C Caesar,B V Carlson,W N Catford,S Chakraborty, S N Chatterjee,M Chartier,G De Angelis,D Cortinagil,D Gonzalezdiaz,H Emling,P Diaz Fernandez,L M Fraile,O Ershova,H Geissel,M Heil,B Jonson,A Kelic,Hakan Johansson, R Kruecken,Thilo Kroll, J Kurcewicz,C Langer,T Le Bleis,Y Leifels,G Munzenberg,J Marganiec,C Nociforo,A Najafi,V Panin,S Paschalis,S Pietri,R Plag,R Reifarth, V Ricciardi,D Rossi,J Ray,H Simon, C Scheidenberge,S Typel,Joanne Taylor,Y Togano,V A Volkov,H Weick,Anthony D Wagner, F Wamers,M Weigand, J S Winfield,D Yakorev,M Zoric

EPJ Web of Conferences（2014）

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摘要

Coulomb breakup of unstable neutron rich nuclei Na-29,Na-30 around the 'island of inversion' has been studied at energy around 434 MeV/nucleon and 409 MeV/nucleon respectively. Four momentum vectors of fragments, decay neutron from excited projectile and gamma-rays emitted from excited fragments after Coulomb breakup are measured in coincidence. For these nuclei, the low-lying dipole strength above one neutron threshold can be explained by direct breakup model. The analysis for Coulomb breakup of Na-29,Na-30 shows that large amount of the cross section yields the Na-28, Na-29 core in ground state. The predominant ground-state configuration of Na-29,Na-30 is found to be Na-28(g.s)circle times V-s1/ 2 and 29Na(g.s)circle times(s1/ 2), respectively.

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