Analysis Of Shape Evolution For Nuclei With Relativistic Mean Field Theory

This thesis firstly systemically introduced some nuclear structure models. Then, relativistic mean field theory (RMF) was introduced intensively and its application for globular nuclear was presented. Lastly we researched the characteristics of nuclear model. It briefly includes several following aspects:Firstly, we introduced some nuclear models such as liquid drop model,shell model,collective model,fermi gas model.Secondly, RMF theory was briefly introduced, and describes the average field of the RMF theory.Thirdly, The relativistic mean field theory is used to investigate the shape evolution of deformed nucleus.The binding energy and quadruple deformation β2of Pd,Cd,Sn,Te,Xe even-even isotopic chains are calculated with four different interactions: TMl,PKl,NL3,NL-SH. These results are consistent with that of experiment, it indicates that RMF theory can well describe the deformation of nucleus. Then, The relativistic mean field theory with the interactions NL1,TM1,NL3,TM2,PK1and NL-SH are used to investigate the shape evolution of Pt isotopes. The calculated binding energy and deformation parameter/3β2are consistent with that of experiment. The potential energy surfaces and the single particle levels show the shape evolution for Pt isotopes. From N=88to N=126,the shape for Pt nuclei evolve from spherical to X(5), and then to stable quadruple deformation, finally back to the spherical. Finally, Analysis of Shape Evolution for Pt isotopes, These results agree with the experimental observations.