We have used the 43MeV/nucleon primary tritium beam of the AGOR facility with an intensity of 4 × 107 pps and the BBS experimental setup to study the (t,3He) reaction between 0◦ and 5◦ lab angles on 12C, 48Ca, and 58Ni 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 0◦ cross section of the 1+ ground state of 12B populated in the 12C(t,3He) 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 48K and 58Co nuclei
The (t,3He) reaction at 43 MeV/u on 48Ca and 58Ni: results and microscopic interpretation / J. Guillot, S. Galès, D. Beaumel, S. Fortier, E. Rich, N. Van Giai, G. Colò, A.M. Van Der Berg, S. Brandenburg, B. Davids, M.N. Harakeh, M. Hunyadi, M. de Huu, S.Y. Van Der Werf, H.J. Woertche, C. Baumer, D. Frekers, E.-W. Grewe, P. Haefner, B.C. Junk, M. Fujiwara. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 73:1(2006), pp. 014616.014616-1-014616.014616-12.
The (t,3He) reaction at 43 MeV/u on 48Ca and 58Ni: results and microscopic interpretation
G. Colò;
2006
Abstract
We have used the 43MeV/nucleon primary tritium beam of the AGOR facility with an intensity of 4 × 107 pps and the BBS experimental setup to study the (t,3He) reaction between 0◦ and 5◦ lab angles on 12C, 48Ca, and 58Ni 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 0◦ cross section of the 1+ ground state of 12B populated in the 12C(t,3He) 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 48K and 58Co nuclei
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