Relativistic effects in neutron-deuteron elastic scattering
Relativistic effects in neutron-deuteron elastic scattering
复制标题
中子-氘核弹性散射中的相对论效应
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
H. Kamada
中科院分区：
文献类型：
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作者：
H. Witała;J. Golak;W. Glöckle;H. Kamada
我们求解了三核子(3N)Faddeev方程，在入射中子实验室能量E{subn}{sup Lab}=28，65,135和250 MeV时，包含相对论特征。这些特征是相对论运动学、助推效应和维格纳自转。作为动力学输入，采用了相当于AV18核子势的相对论核子-核子(NN)相互作用。Wigner转动对弹性散射观测的影响很小。在较高的能量下，增强效应是显著的。尽管相对论相空间因子比非相对论相空间因子增大，但它们在较高能量下减小了跃迁矩阵元，对截面的影响很小，主要局限于后向角。
We solved the three-nucleon (3N) Faddeev equation including relativistic features at incoming neutron lab energies E{sub n}{sup lab} = 28,65,135, and 250 MeV. Those features are relativistic kinematics, boost effects and Wigner spin rotations. As dynamical input a relativistic nucleon-nucleon (NN) interaction exactly on-shell equivalent to the AV18 NN potential has been used. The effects of Wigner rotations for elastic scattering observables were found to be small. The boost effects are significant at higher energies. They diminish the transition matrix elements at higher energies and lead in spite of the increased relativistic phase-space factor as compared to the nonrelativistic one to rather small effects in the cross section, which are mostly restricted to the backward angles.