Author/Authors :
G. Neyens، نويسنده , , G. Georgiev، نويسنده , , R. Grzywacz، نويسنده , , M. Hass، نويسنده , , F. de Oliveira Santos، نويسنده , , M. Lewitowicz، نويسنده , , D.L. Balabanski، نويسنده , , C. Bingham، نويسنده , , C. Borcea، نويسنده , , N. Coulier، نويسنده , , R. Coussement، نويسنده , , J.M. Daugas، نويسنده , , G. Defrance، نويسنده , , G. Goldring، نويسنده , , M. Gorska، نويسنده , , H. Grawe، نويسنده , , C. OʹLeary، نويسنده , , I. Macovei، نويسنده , , H. Mach، نويسنده , , R. Page، نويسنده , , et al.، نويسنده ,
Abstract :
First and preliminary results of an experiment aimed at measuring g-factors of isomeric states in neutron-rich nuclei in the vicinity of 68Ni are reported. Isomers near the predicted N=40 sub-shell closure in 69Cu, 67Ni and 66Co have been populated in the fragmentation of a 76Ge, 61.4 MeV/u beam onto a 145 mg/cm29Be target at GANIL. Here we report the results for the 357(2) ns, Iπ=13/2+ isomer in 69Cu for which a preliminary gyromagnetic ratio of |g|=0.195(9) was derived. The Larmor precession of the spin-oriented isomeric ensemble was measured by recording γ–ion correlations in a 20 μs time window. This pioneering experiment has indicated interesting nuclear structure information and shows promising possibilities for future studies of this kind.
Keywords :
Nuclear structure , Projectile fragmentation reactions , g-factors , 69mCu , TDPAD , Exotic nuclei
