Study On Neutron Capture Reaction And Photonuclear Reaction Based On TALYS Program

In this paper,the reaction cross-section of neutron capture reaction and light nuclear reaction is calculated by using the nuclear reaction simulator TALYS program.The main work is divided into the following two parts:The first task was to use the TALYS program based on the Hauser-Feshbach statistical model to simulate the ¹⁵¹Eu?n,?¹⁵²Eu reaction at the neutron energies from0.01 to 20MeV.Moreover,the experimental data in EXFOR database were collected and compared with the theoretical calculation.The ¹⁵¹Eu neutron capture cross-section plays an important role in reactor physics and in the slow neutron capture of nuclear astrophysics.In particular,the existence of two isomers of ¹⁵²Eu makes ¹⁵¹Eu neutron capture cross-section difficult to be measured and distinguished.The results show that there is a large error in the cross-section measurement of the ground state and the first isomeric state due to the interference of the 121.78 keV energy level,whereas the theoretical values of the ground state and the second isomeric state are basically consistent with the existing experimental values.The results of these can guide the development of future related experiments and evaluate the accuracy of TALYS statistical model in the relevant aspects.The second task is to use the TALYS program to calculate the relevant cross-section of the giant dipole resonance?GDR?in the ¹²C light nuclear reaction.The cross-section for?,N??N=n or p?reaction is important for investigation of nuclear structure,especially in low-energy giant dipole resonance?GDR?.The total cross-section of ¹²C?,n?¹¹C reaction at the gamma energies from 15 to 40MeV and¹²C?,p?¹¹B reaction at the gamma energies from 15 to 110MeV were calculated by using the latest TALYS-1.8 code,respectively.In the calculations,the five types of gamma strength function models in TALYS program have been used in the photoneutron and phtoproton reaction.The results are compared with the experimental data from the EXFOR database and the evaluated nuclear data from TENDL-2015.Through analysis,the best model of the gamma strength function can be obtained.Moreover,it can verify the information of the alpha cluster nuclear structure of ¹²C indirectly.