Investigation On The Mechanism Of Synthesizing Superheavy Elements With ⁵⁰Ti As A Projectile

Synthesis of superheavy nuclei is one of the important frontier fields of nuclear physics community and gain heavier superheavy nuclei is a problem that the nuclear physics researchers have been concerned about. In recent years many famous international laboratories, such as the German Helmholtz Heavy Ion Physics Research Center(GSI), the Lawrence Livermore National laboratory, Joint Nuclear Research Institute of Russia Dubna, Rlkagaku Institute of Physical and Chemical Research(RIKEN) and so on have put in considerable manpower and material resources on the construction of heavy ion accelerator and related experimental research equipment to synthesis of superheavy nuclei. At the same time, the technology has been detected with(-1210barn)pb or even lower reaction cross section. In recent years, our country also attaches great importance to the development of overweight nuclear, and put it into the national key basic research development plan.Currently, human use heat fusion method for neutron-rich48 Ca bombardment of heavy Actinide Nuclei synthesis of the heaviest elements heavy elements Z=118. In order to reach nuclear properties more stable superheavy nuclei island of stability, people want to synthesize heavier Z>118 elements. In the experiment, the synthesis of superheavy nuclei is quite time-consuming and money, and at present, encountered difficult section of low generation. Therefore, it is very important to predict the suitable target composition and the formation of the cross-section by theoretical research work.Firstly,this paper introduces the research progress of the superheavy nuclei at home and abroad and enumerates the specific methods for the synthesis of the superheavy nuclei in current major laboratories, enables us to have a general understanding of the research status at home and board, and also gives the content, characteristics, synthesis of superheavy nuclei of theoretical basis, model and two-step model of specific ideas of this thesis.In this paper we use the two-step model developed in recent years that is heavier than48 Ca spherical neutron magic numbers of nuclear50 Ti as projectile bombardment actinide elements in the target nuclei fusion cross-sections are calculated, systematically calculated synthesis of superheavy nuclei systematic Z=117~121 responses of adhesion probability stickingp, formed probabilityformpand fusion probabilityfusionp. Calculation results show that, the heavier the element is, the smaller the probability of fusion is, the fusion probability increases with the increase of incident energy, decreases with the increase of angular momentum.This paper further studies the synthesis mechanism of superheavy nuclei that is synthetized with50 Ti as a projectile, through giving the residual cross-section s,the separation energy S,the excitation energy *E,the reaction energy Q,the relationship between the shell correction energy shell(35)E and the mass number A, to illustrate the effect of the various factors on the fusion mechanism, and analyzed the isotope dependence of the synthesis of superheavy nuclei. Research shows that, the formation of superheavy nuclei is a very complicated kinetic process, the formation of probability is affected by many aspects.