分类: 其他 提交时间: 2023-10-31
摘要: The study of d(d,p)t reaction is very important for the nucleosynthesis in both standard Big Bang and stellar evolution, as well as for the future fusion reactors planning of energy production. The d(d,p)t bare nucleus astrophysical S(E) factor has been measured indirectly at energies from about 400 keV down to several keV by means of the Trojan horse method applied to the quasi-free process 2H(6Li, pt)4He induced at a lithium beam energy of 9.5 MeV, which is closer to the zero quasi-free energy point. An accurate analysis leads to the determination of the Sbare(0) = 56.72.0keVb and of the corresponding electron screening potential Ue = 13.2 4.3eV. In addition, this work gives an updated test for the Trojan horse nucleus invariance comparing with previous indirect investigations using 3He = (d + p) breakup.
分类: 物理学 >> 核物理学 提交时间: 2023-10-31
摘要: The Coulomb barrier and electron screening cause difficulties in directly measuring nuclear reaction cross sections of charged particles in astrophysical energies. The Trojan-horse method has been introduced to solve the difficulties as a powerful indirect tool. In order to understand experimental spectra better, Geant4 is employed to simulate the method for the first time. Validity and reliability of the simulation are examined by comparing the experimental data with simulated results. The Geant4 simulation can give useful information to understand the experimental spectra better in data analysis and is beneficial to the design for future related experiments.