Analog states and resonances

Description of basic parameters of analog resonances on the base of the shell approach to the theory of nuclear reactions is suggested. Results are compared with experimental data. Aspects of the theory of the resonance nuclear reactions are studied. A certain version of the shell approach to the theory of nuclear reactions (semimicroscopic approach) has been formulated on the base of methods of the finite Fermi systems. Parametrization of energy-averaged amplitudes and cross sections of resonance reactions in the range of isolated input state is given. Analog states and resonances are investigated within the framework of the shell model. Considered were isobaric symmetry of Hamiltonian of the shell model as well as shell structure of symmetry enrgy, analog collective states and isotopic splitting of giant multipole resonances. Production of analog resonances has been investigated. In terms of shell and optical models derived are formulae for the basic parameters of partial proton and neutron widths. Analysis of the basic parameters of analog states and analog resonances in cross sections of nucleon-nucleus interaction shows that the stated semimicroscopic version of the shell approach to the theory of nuclear reactions is a structural method for theoretical investigation of high-excited states of nuclei and corresponding resonance nuclear reactions