Kinematically complete data is presented on the break-up reaction Sn(Be, Be + n) Sn at E=90 MeV for several scattering angles inside the grazing angle. These data are compared with the predictions of a Coulomb break-up model. It is shown that the data can be understood in terms of the Coulomb model provided some account is taken of the interactions of the break-up fragments with the target. Analysis of the Be break-up data, using radio-isotope measurements of the Be(γ, n) cross-section, indicates that for this photo-disintegration reaction there is probably a significant direct component to the threshold cross-section, in addition to a threshold resonance at 1.69 MeV.
|Number of pages||5|
|Journal||Physics Letters B|
|Publication status||Published - 1 Jan 1992|