Can the neutron-capture cross sections be measured with Coulomb dissociation?
In this paper we present first results from a 8Li electromagnetic neutron-breakup experiment. Specific reactions studied were Pb( 8Li, 7Li+n) Pb and C( 8Li, 7Li+n) C at 41MeV/nucleon beam energy. This is an effort to compare the results of a Coulomb dissociation experiment with the well determined (n,γ) reaction cross sections at astrophysical energies. The angular dependence of the cross section above 7 degree, which is the grazing angle of 8Li- Pb system, is similar in shape for lead and carbon and approximately proportional to A 2/3 in magnitude indicating that the nuclear dissociation is the main component in this region. At very forward angles the angular distributions differ significantly and the electromagnetic dissociation dominates for the lead, although the nuclear contribution is not negligible.
PACS.25.40.Lw Radiative capture 25.70.De Coulomb excitation
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