A correlated background in invariant mass spectra of three-body systems

摘要

An analytical approach with Yukawa type three-body wave functions is used to describe breakup reactions of three-body systems in the sudden approximation. The model is applied to the two-neutron halo nuclei Li-11, He-6 and correlations in the relative energy distributions of the break-up fragments are found. Since no final state interactions are included in the model the derived energy distributions should be present in experimental invariant mass spectra as a background, on which possible resonances will be superposed. Interesting low energy features are found for the total excitation energy of Li-11 and also for the relative energy distributions in the binary subsystems of Li-11 and He-6. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 34]