Reaction cross sections in the ten-nucleon system

Abstract

The properties of the 10-nucleon system are investigated with a multiconfiguration resonating-group method, which consists of α+6Li,d+8Be,d+8Be*, and α+6Li* cluster configurations, where6Li* and8Be* represent the rotational excited-states of6Li and8Be with orbital angular momentum equal to 2. The results show that, among reactions initiated from the α+6Li incident channel, the inelastic-scattering process6Li(α,α′)6Li* dominates. The α-transfer reactions6Li(α,d)8Be and6Li(α,d)8Be* have smaller cross sections, but still contribute, on the average, to about one-third of the α+6Li total reaction cross sections in the centre-of-mass energy region between 12 and 24 MeV. The calculated α+6Li total reaction cross section at 27 MeV is equal to around 70% of the empirical value obtained by analyzing α+6Li differential scattering cross-section data. This is a respectable amount, considering the complexity of the problem and that no adjustable parameters are involved in the calculation. Based on the findings of this and previous investigations, some general criteria which govern the importance of cluster-transfer processes in light nuclear systems have also been obtained. These criteria should be very useful in qualitatively understanding the behaviour of other systems that have hitherto not been studied with the multi-configuration resonating-group method.