Radiative Capture Processes in Multi-Size-Scale Algebraic Version of Resonating Group Model

11th International Conference on Clustering Aspects of Nuclear Structure and Dynamics

Solovyev, A.S.^1 ; Yu Igashov, S.^1 ; Tchuvil'Sky, Yu M.^1,2,3

Dukhov Research Institute of Automatics (VNIIA), ul. Sushchevskaya 22, Moscow

127055, Russia^1

Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 1(2), Leninskie gory, GSP-1, Moscow

119991, Russia^2

Pacific National University, Tikhookeanskaya str. 136, Khabarovsk

680035, Russia^3

关键词: Astrophysical S factors;    Discrete spectrum;    Experimental values;    Group modeling;    Multi sizes;    Nuclear systems;    Radiative capture;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/863/1/012015/pdf
DOI  :  10.1088/1742-6596/863/1/012015

来源: IOP

【 摘 要 】

Novel microscopic approach based on so-called multi-size-scale algebraic version of the resonating group model to describing radiative capture reactions is developed. The main idea of the approach is to expand nuclear system wave functions of discrete spectrum and continuum over basis wave functions of the algebraic version of the resonating group model with different values of oscillator radius. It allows to calculate astrophysical S-factor or cross section for radiative capture reaction and at the same time to reproduce exactly the experimental values for breakup thresholds of the final nucleus states into two fragments -colliding nuclei, as well as to obtain corresponding scattering phase shifts fitting existing experimental data. The approach is applied to description of the important mirror3H(α, γ)7Li and3He(α, γ)7Be reactions to demonstrate its possibilities. Calculated results are in good agreement with experimental data.