Investigation Of Sticking Cross Section In Synthesis Of Superheavy Nuclei With Fe As Projectile

The synthesis of superheavy elements has entered a new period. With the improvement ofexperimental equipment and the maturity of theoretical model，the elements studied becomegradually heavier and heavier. Synthesis of superheavy elements not only becomes one of hottopics in the study of nuclear physicists, but also has become one of the branches of the rapiddevelopment of nuclear physics. For example the HIRFL of China, Japan’s RIKEN, Dubna ofRussia, Germany’s GSI and so on are all famous nuclear physics laboratory in the world.Firstly this paper gives out the reason for the scientists to synthesize the superheavy nuclei,its historical background and significance, and the development and current situation of thesynthesis of superheavy nuclei. Introduces some basic theory of nuclear reaction, and presentsthe terms and definitions used in this paper. Summarizes largely the results of the synthesis ofsuperheavy nuclei from scientists all over the world, and presents the model, method, time andresults.Secondly introduce the sticking cross section investigated with Fe as projectile.We usetwo-step model to study the process of heavy ion fusion. The process of heavy nucleus reactioncan be divided into to two steps: the first step is the sticking of the two nuclei, the projectile withrevers target nucleus, the distance between the two nuclears become smaller and smaller andfinally adhere together, form a dual system the second step is the formation of the compoundnuclei. With the changing of time, the shape of the dual-core system changes, two nuclear fusetogether finally, form a compound nucleus.The dynamic process of the two parts can all bedescribed by Langevin equation. Since the two parts are independent, we can discuss these twostages separately. The sticking process is mainly studied in the paper. Sticking phase refers to theincident nucleus move from the distance to the target surface and contact with the target nucleus.In this stage, the incidence of nuclear need across the coulomb barrier and contact with thesurface of the target nucleus, the probability to overcome the coulomb barrier in this process iscalled sticking probabilityPs tick.According to the experimental data of the excitation energiesand sticking cross section with58Fe248Cmand58Fe208Pb, the optimal values ofCand Bis refitted by Fe as projectile and Actinide series nuclei as target. The influence of C and BonE*curve, angular momentum and excitation energy on sticking cross section are alsodiscussed. In a word, it is expected that the theoretical data graph in this paper can be of help tothe scientists in founding new elements, and also guide experiment theoretically.