Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..haw.df004m&link_type=abstract
American Physical Society, First Joint Meeting of the Nuclear Physicists of the American and Japanese Physical Societies October
Astronomy and Astrophysics
Astrophysics
Scientific paper
The time-dependent mesh method is applied to the calculation of the Coulomb breakup of a projectile into two charged fragments. The projectile is described in the potential model and its center of mass is assumed to follow a classical trajectory. The approach is compared with the first-order time-dependent perturbation approximation based on an electric dipole interaction under the same model assumptions. The numerical technique is applied to the ^17F + ^208Pb arrow ^16O + p + ^208Pb breakup in order to test the validity of the extraction of the E1 astrophysical S factor for the ^16O(p,γ)^17F radiative capture reaction to the ^17F ground state. After carefully testing the validity of the numerical technique, we show that the accuracy of the astrophysical S factor extracted in such a way is better than 5 % for projectile velocities above about 0.25 c in large domains of impact parameters and relative energies between the fragments. Breakup cross sections are also calculated as a function of the relative energy between the fragments at different projectile velocities. A comparison is presented and discussed with the only existing experimental differential cross section at the projectile energy of 10 MeV/nucleon.
Baye Daniel
Melezhik Vladimir S.
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