Abstract
We have used the 43 MeV/nucleon primary tritium beam of the AGOR facility with an intensity of pps and the BBS experimental setup to study the (t,) reaction between and lab angles on , , and targets. The standard ray-tracing procedure has allowed us to obtain excitation-energy spectra up to 30 MeV in six angular bins for each residual nucleus, with an average energy resolution of 350 keV. The reaction mechanism has been described in distorted-waves Born approximation (DWBA) using the DWBA98 code. In this approximation, the form factor is treated as a folding of an effective projectile-nucleon interaction with a transition density. The effective projectile-nucleon interaction has been adjusted to reproduce the cross section of the ground state of populated in the (,) reaction. We have employed random-phase approximation (RPA) wave functions of excited states to construct the form factor instead of the normal modes wave functions used earlier. This new DWBA+RPA analysis is used to compare calculated and experimental cross sections directly and to discuss the giant resonance excitations in and nuclei.
8 More- Received 14 January 2005
DOI:https://doi.org/10.1103/PhysRevC.73.014616
©2006 American Physical Society