抄録
The 6,7Li + n reactions are important not only from the basic interest but also from the application point of view. The 7Li nucleus is well described by the cluster model such as α + t. Therefore, it is necessary for us to treat the Li + n system with α + t + n model. In this study, cross sections for 7Li(n,n′) 7Li*→ α + t reactions are evaluated by using the CDCC, in which we adopt microscopic wave functions of 7Li with the α + t model. The advantage of this method is to obtain not only elastic and inelastic cross sections but also neutron spectra within the same framework. We first calculate the elastic cross sections for the 7Li + n scatterings with the complex Jeukenne-Lejeune-Mahaux effective nucleon-nucleon (JLM) interaction. In the present analyses, it is found that the elastic cross sections for incident energies at 11.0, 13.0, 14.1 and 18.0 MeV can be reproduced by the present cluster model with one normalization parameter for the imaginary part of the JLM effective interaction. Next, we calculate the inelastic scattering cross sections and the neutron spectra. The calculated inelastic cross sections of the 7/2− resonance states and neutron spectra for 7Li breakup into continuum states are in good agreement with experimental data. From those results, we conclude that the CDCC method with the JLM is very powerful for the data evaluation of the 7Li(n,n′) reactions.
