Abstract
For the first time Borromean nucleus induced reactions have been measured below the three-body breakup threshold. A set of angular distributions for the single and two neutron transfer as well as on the charge exchange reaction channel has been obtained. The experimental data have sufficient angular coverage and precision to allow for the discrimination between different model predictions, which do not suffer from ambiguities introduced to the interpretation of experimental data due to flux losses into the three-body breakup channel. The viability of the idea is demonstrated in the case of nuclear reactions induced by the simplest Borromean nucleus, i.e., ${}^{6}\mathrm{He},$ on a structureless target, i.e., protons. Comparison with different theoretical approaches suggest that coupled channel effects play an important role. A decrease of the model wave function's rms radius of 0.15 fm alters the predicted angular distributions such that they no longer follow the experimental results.
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