Extracting the Electric Dipole Breakup Cross Section of One-Neutron Halo Nuclei from Inclusive Breakup Observables

Abstract

−1n , respectively. It is shown that, within about 5% error, σ( E1) can be obtained by subtracting �σ C −1n from σ Pb −1n , as assumed in preceding studies. However, for the reaction of weakly bound projectiles, the scaling factoris found to be about twice as large as that usually adopted. As a result, we obtain a 13-20% smaller σ( E1) of 31 Ne at 250MeV/nucleon than extracted in a previ- ous analysis of experimental data. By compiling the values ofobtained for several projectiles, � = (2.30 ± 0.41)exp(−Sn) + (2.43 ± 0.21) is obtained, where Sn is the neutron separation energy. The target mass-number dependence of the nuclear parts of the one-neutron removal cross section and the elastic breakup cross section is also investigated.