Author/Authors :
J. GUILLOT، نويسنده , , D. Beaumel، نويسنده , , W. Tan and A.M. van den Berg، نويسنده , , S. Brandenburg، نويسنده , , B. Davids، نويسنده , , Gary S. Fortier ، نويسنده , , M. Fujiwara، نويسنده , , S. Gale`s، نويسنده , , M.N. Harakeh، نويسنده , , M. Hunyadi، نويسنده , , M. de Huu، نويسنده , , H.J. Wo¨rtche، نويسنده ,
Abstract :
A 130 MeV primary tritium beam, newly developed at the superconducting cyclotron AGOR, has been used for the investigation of 1ħω and 2ħω isovector giant resonances in58Co via theτ+ channel. The angular distributions of double-differential cross sections have been extracted betweenEx = 7 and 30 MeV fromθlab = 0° to 6°. A DWBA analysis with normal-mode (NM) wave functions and a multipole-decomposition analysis (MDA) indicate strength for the monopole resonances (dominated by the spin-flip transition) fragmented between 10 and 27 MeV excitation energy, in rather good agreement with preliminary RPA calculations.
