The (t,He3) reaction at 43 MeV/nucleon on Ca48 and Ni58: Results and microscopic interpretation

J. Guillot, S. Galès, D. Beaumel, S. Fortier, E. Rich, N. Van Giai, G. Colò, A. M. Van Den Berg, S. Brandenburg, B. Davids, M. N. Harakeh, M. Hunyadi, M. De Huu, S. Y. Van Der Werf, H. J. Wörtche, C. Bäumer, D. Frekers, E. W. Grewe, P. Haefner, B. C. JunkM. Fujiwara

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Abstract

We have used the 43 MeV/nucleon primary tritium beam of the AGOR facility with an intensity of 4×107 pps and the BBS experimental setup to study the (t,He3) reaction between 0°and 5°lab angles on C12, Ca48, and Ni58 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 B12 populated in the C12(t,He3) 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 K48 and Co58 nuclei.

Original languageEnglish
Article number014616
JournalPhysical Review C - Nuclear Physics
Volume73
Issue number1
DOIs
Publication statusPublished - Jan 2006

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Guillot, J., Galès, S., Beaumel, D., Fortier, S., Rich, E., Van Giai, N., Colò, G., Van Den Berg, A. M., Brandenburg, S., Davids, B., Harakeh, M. N., Hunyadi, M., De Huu, M., Van Der Werf, S. Y., Wörtche, H. J., Bäumer, C., Frekers, D., Grewe, E. W., Haefner, P., ... Fujiwara, M. (2006). The (t,He3) reaction at 43 MeV/nucleon on Ca48 and Ni58: Results and microscopic interpretation. Physical Review C - Nuclear Physics, 73(1), [014616]. https://doi.org/10.1103/PhysRevC.73.014616