Abstract
Isovector Resonances are studied through the ( 13C, 13N-n) reaction at 60A.MeV incident energy on 208Pb and 58Ni targets. Neutron decay of the resonances observed in these reactions has been measured in coincidence with the 13N ejectile. The measured neutron multiplicity has been used to deduce the contribution of fast processes like Pick-Up Break-Up and Quasi-Free Charge Exchange to the singles spectrum. The analysis of the neutron decay of the observed resonances revealed a direct branch to well defined final states in the residual nuclei, 207Tl and 57Co. In the case of isovector resonances in 58Co, an angular distribution of this direct branch has been extracted. The strong anisotropy observed for this distribution does not appear compatible with the decay of a pure monopole state.
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