Speaker
Description
Single-particle motion of nucleons is quenched by so-called short-range and long-range correlations, which was first observed on some stable nuclei through (e,e’p) and (d, $^3$He) transfer reactions. Systematic studies of Heavy-Ion (HI) induced single-nucleon knockout at intermediate-energy have drawn a surprising conclusion that the quenching factor Rs, simply defined as the ratio of experimental cross-section and theoretical counterpart, exhibits a strong negative dependence on the Fermi surface asymmetry ∆S. Interestingly, in proton induced knockout and transfer framework, no such dependence has been found so far. However, there is only scarce data of transfer reactions on extremely weakly bound nuclei with ∆S ≤ -15 MeV, where HI induced knockout shows great discrepancy with current transfer reaction trend, so testing the quenching effect in such extreme ∆S region with different probes is crucial for understanding this longstanding issue. In this work, we analyzed the quenching factor of $^{15}$C valence neutron using single-neutron-removal transfer reactions. A bridge between nuclear structure and nuclear astrophysics was constructed through this effect and radioative capture theory.
