The reaction ⁶Li(α,2α)d was studied at 50.4, 59.0, 60.5, 70.3 and 79.6 MeV. The angular distributions and energy dependence of the off-energy-shell α-α cross section were extracted and compared with those for free α-α scattering. The agreement between the two is excellent, as predicted by the peripheral model in the quasifree approximation, but the quasifree approximation is not precise enough.
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Pugh et al. (1969) studied this question.
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