NUCLEAR SCATTERING OF LOW-ENERGY PIONS
NUCLEAR SCATTERING OF LOW-ENERGY PIONS
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低能π介子的核散射
DOI：
10.1103/physrevc.19.929
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发表时间：
1979
影响因子：
3.1
通讯作者：
J. A. Carr
中科院分区：
文献类型：
--
作者：
K. Stricker;H. McManus;J. A. Carr
我们从分析介子原子数据所得到的经验值估算了低能介子核散射的光学势参数。讨论了这些参数中的模糊性。轻元素的低能弹性散射截面的形状对光学势的排斥部分和速度相关吸引部分的相对强度特别敏感，并被介子原子参数很好地再现。在低能时，吸附是主要的反应通道。利用π核子相移将光学模型参数外推到更高的能量。讨论了弹性角分布和非弹性角分布以及不同部分截面的行为，并与实验进行了比较。
We have estimated the parameters of the optical potential for low energy pion-nucleus scattering from the values obtained empirically in the analysis of pionic atom data. The ambiguities in these parameters are discussed. The shape of the low energy elastic scattering cross section for light elements is particularly sensitive to the relative strength of the repulsive and velocity-dependent attractive parts of the optical potential, and is well reproduced by pionic atom parameters. Absorption is the dominant reaction channel at low energies. Pion nucleon phase shifts are used to extrapolate optical model parameters to higher energies. The behavior of the elastic and inelastic angular distributions and of various partial cross sections is discussed, and compared with experiment.