Simultaneous and sequential transfer of proton and alpha-particle in elastic11B+16O scattering

Abstract

We have developed a method to treat multi-nucleon transfer as the transfer of two — possibly different — subclusters, as e.g. with “5Li”=(αp). As a consequence we take into account two reaction mechanisms, the one-step simultaneous and the two-step sequential transfer of the two clusters. We formulate the method of calculation of the simultaneous transfer form factor for two non-identical particles and also of the two-cluster spectroscopic amplitudes from shell model wave functions. We apply the method to the elastic transfer reaction11B(16O,11B)11O together with the single α andp transfer reaction11B(16O,15N)12C forElab between 30 and 60 MeV. We obtain a consistently good description of all the data by reasonable adjustment of the spectroscopic amplitudes. In particular we find that the simultaneous (αp) transfer is considerably more important than the sequential transfer indicating strong five-nucleon correlations in these light nuclei.