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p ~ (24) Mg ~ ~ (180) Hf nuclear reaction optical model calculations and analysis

Author: ZhangYongYong
Tutor: ZhangZhengJun
School: Northwestern University
Course: Theoretical Physics
Keywords: Nuclear reaction Optical model Optical potential To bomb -section Elastic scattering angular distributions
CLC: O571.4
Type: Master's thesis
Year: 2010
Downloads: 35
Quote: 0
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Abstract


Commercial applications of nuclear energy systems also exist a number of defects hinder the fissile further development , the final deal with the problem that long-lived , highly radioactive nuclear waste , uranium resource utilization and security issues . Accelerator -driven subcritical system ADS will be an effective way to solve this problem . Microscopic nuclear reaction data is the basis of the design of the entire ADS system is directly related to the safety and performance of the entire system . The method of nuclear reaction theory , as well as the study of micro - data is essential not only for the design of the ADS system , and for further exploration of the nature of the nuclear structure is also of great significance to the development of high-energy nuclear reaction theory . This work belongs to the \This work is based on the optical model potential method , based on proton and 24Mg , 28Si , 48Ca , 59Co , 120Sn reaction to bomb -section , elastic scattering angular distributions of the experimental data ( taken from EXFOR nuclear experimental database ) , the use of optical model to automatically tune the parameters program APMN , 5 sets ( in the the protons incident energy Ep ≤ 200MeV conditions under ) optical potential parameters with the experimental data . We use five sets of optical potential parameters predicted 24Mg to 180Hf reaction cross section , elastic scattering angular distributions . Since the optical potential parameters have a certain universality , we have gone through the comparison of theoretical calculations and experimental data given the scope of application of the five sets of parameters . In addition , we make use of a given proton optical potential parameters of Becchetti and Greenlees ( abbreviated as BG) also made a calculation and comparison . In this paper, the optical potential parameters to be superior to the ubiquitous proton optical potential parameters of BG given to overcome BG optical potential parameters predicted reaction cross section is too large difficulties 50MeV energy region above . In addition , the optical potential parameters given role attribute of the incident proton and the target nucleus , the potential energy part of the Hamiltonian . We apply the optical potential parameters obtained quantitative calculation of the real part of the optical potential of Woods-Saxon phenomenological , the imaginary part of the optical potential , the imaginary part of the body to absorb and the imaginary part of the surface absorption and proton incident energy , the role of the radius of the relationship . Proton optical potential and BG given the results were compared with the theoretical analysis of the optical potential for the real part and the imaginary part of optical potential and nuclear reactions elastic scattering angular distribution and the relationship between the absorption cross section .

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CLC: > Mathematical sciences and chemical > Physics > Nuclear physics,high energy physics > Nuclear physics > Nuclear reaction
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