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1、安徽大學(xué)碩士學(xué)位論文相對(duì)論平均場(chǎng)對(duì)原子核形狀演化和相變的研究姓名:姚寶梅申請(qǐng)學(xué)位級(jí)別:碩士專業(yè):理論物理指導(dǎo)教師:郭建友2010-04相對(duì)論平均場(chǎng)對(duì)原子核形狀演化和相變的研究 IIAbstract In this thesis, the theoretical development on nuclear structure and several primary nuclear structure models are reviewe
2、d briefly. The framework of relativistic mean field (RMF) theory and its application to deformed nuclei are introduced. The systematic investigation on shape evolution is performed for Mo and Z~40 isotopes in RMF theory.
3、 Some main results are summarized as follows: i) Several primary models of nuclear structure like shell model, collective model and Interacting Boson Model (IBM) are introduced. ii) The theoretical framework of RMF is in
4、troduced. In RMF theory, nucleon is described as a Dirac particle with the interactions by exchangingσ , ω , ρ and photon. The corresponding lagrangian is presented. The equations of motion are obtained from Euler-Lagra
5、nge equation, which gives Dirac equation, Klein-Gordon equation and electric-magnetic equation for nucleon, mesons and photons respectively. The applications of RMF theory to axially symmetric deformed nuclei are introdu
6、ced. iii) The microscopic quadrupole constrained relativistic mean field model is applied to investigate the shape evolution for Mo isotopes with all the most used interactions, i.e., PK1, NL3, TM1 and NLSH. The calculat
7、ed binding energies and deformation 2 β are shown to be consistent with the experimental data. The potential energy surfaces show a clear shape evolution between spherical U(5) and γ-unstable O(6) for the even-even Mo i
8、sotopes with increasing neutron number, and 94Mo is suggested to be the γ-unstable nucleus, which is favored by the experimental data. Similar conclusion is also drawn from the neutron single particle spectra. Finaly, th
9、e chain of 82Sr, 84,86Zr, 88Mo, 90Ru, 92,94Pd, 96, 98Cd has been studied with PK1 and NL3 interactions, and a transition from oblate and prolate coexistence to oblate, to prolate, and finally to spherical is clearly exhi
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