Abstract
Total reaction cross section and elastic scattering angular distribution calculations are discussed for composite (halo) nuclei with well-developed core and valence particle structures. We review the basis of few-body calculations of reaction cross sections and use a simple binary cluster model to clarify the inadequacy of optical limit Glauber calculations for determining the sizes of correlated nuclear systems. An outstanding discrepancy in the case of the 6Li and 6He systems is discussed. We show that under certain conditions complementary information on halo sizes could be obtained from precision elastic scattering measurements at lower energies.
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