Author/Authors :
R. Kanungo، نويسنده , , Z. Elekes، نويسنده , , H. Baba، نويسنده , , Zs. Dombradi، نويسنده , , Zs. Fulop، نويسنده , , J. Gibelin، نويسنده , , ?. Horv?th، نويسنده , , Y. Ichikawa، نويسنده , , E. Ideguchi، نويسنده , , N. Iwasa، نويسنده , , H. Iwasaki، نويسنده , , S. Kawai، نويسنده , , Y. Kondo، نويسنده , , K. Toyota and T. Motobayashi ، نويسنده , , M. Notani، نويسنده , , T. Ohnishi، نويسنده , , A. Ozawa، نويسنده , , H. Sakurai، نويسنده , , S. Shimoura، نويسنده , , E. Takeshita، نويسنده , , et al.، نويسنده ,
Abstract :
A search for an isomeric state in the neutron-rich nucleus 19C is reported. The existence of an isomer in the nucleus is predicted by shell model calculations which also predicts the ground-state of the nucleus to be 1/2+. An isomeric transition is however not observed in the present investigation. An estimation of upper limit of isomer ratio in the beam is discussed. Furthermore, the non-observation of an isomer includes the possibility of 19C having a different ground state spin. The 17C and 17B nuclei were also investigated for delayed gamma transitions but do not exhibit any isomeric transition.
Keywords :
I? , 17 , 19C , 17B deduced , transitions , Nuclear reactions , no isomeric state , 1H (19C , 19C?) , (17C , 17C?) , 17B?) , (17B , Measured , 19C deduced , prompt and delayed E? , Elab=53 MeV/nucleon
