Nuclear breakup of $^8$B in a direct fragmentation model

Abstract

We calculate the cross sections of the elastic and inelastic breakup modes for the inclusive breakup reaction $^{28}$Si($^8$B,$^7$Be) at beam energies between 10 - 40 MeV/nucleon within a direct fragmentation model formulated in the framework of the post form distorted-wave Born-approximation. In contrast to the case of the stable isotopes, the inelastic breakup mode is found to contribute only upto 30% to the total breakup cross section, which is in agreement with the recently measured experimental data. However, the high energy tail of the energy spectra of $^7$Be fragment is dominated by the inelastic breakup mode. The breakup amplitude is found to be dominated by the contributions from distrances well beyond the nuclear surface.

Plain latex file, three figs. eps files included. To appear in Physical Review C