Microscopic Three-Body Force Effect on Nucleon-Nucleon Cross Sections in Symmetric Nuclear Matter
Microscopic Three-Body Force Effect on Nucleon-Nucleon Cross Sections in Symmetric Nuclear Matter
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DOI：
10.1088/0253-6102/50/5/41
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发表时间：
2008-11
影响因子：
3.1
通讯作者：
Zhang Hong-fei;Zuo Wei;Lombardo Umberto;L. Zeng-hua;Li Jun-qing
中科院分区：
文献类型：
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作者：
Zhang Hong-fei;Zuo Wei;Lombardo Umberto;L. Zeng-hua;Li Jun-qing
本文采用Brueckner-Hartree-Fock近似方法，在考虑微观三体力贡献的情况下，采用阿贡V14势，计算了不同密度对称核物质中中子-质子和质子-质子碰撞截面.我们分别研究了三体力对有效质量和散射振幅的影响。计算中考虑了三体力的重排作用，使中子和质子的有效质量减小，截面振幅降低。结果表明，三体力的作用是排斥的，特别是在高密度和大动量的情况下，这将显著地抑制截面。
We provide a microscopic calculation of neutron-proton and proton-proton cross sections in symmetric nuclear matter at various densities, using the Brueckner–Hartree–Fock approximation scheme with the Argonne V14 potential including the contribution of microscopic three-body force. We investigate separately the effects of three-body force on the effective mass and on the scattering amplitude. In the present calculation, the rearrangement contribution of three-body force is considered, which will reduce the neutron and proton effective mass, and depress the amplitude of cross section. The effect of three body force is shown to be repulsive, especially in high densities and large momenta, which will suppress the cross section markedly.