论文标题
核形状过渡和弹性磁电子散射
Nuclear shape transitions and elastic magnetic electron scattering
论文作者
论文摘要
来自ODD-A核目标的向后弹性电子散射的特征是磁性元素，其中包含有关核结构的精确信息。我们研究了同位素和等渗链中与演化和形状转变相关的结构效应的磁性因子的敏感性。在平面波诞生的近似中进行磁性颜色因子的计算。核结构是从基于Skyrme HF+BCS形式主义的变形自洽的平均场计算中获得的。集体效应包括在曲柄近似中，而在相干密度波动模型中考虑了核子核子相关性。发现磁性因子的演变表现出在选定的同位素和同型链中显示的形状跃迁的特征，这些链中涉及稳定和不稳定的核。几种情况被确定为适合显示这种形状过渡的指纹的候选者。新一代的电子散射实验将在不久的将来提供涉及电子 - 放射光束横梁的偏对层，从而导致对该领域的新兴趣。
Backward elastic electron scattering from odd-A nuclear targets is characterized by magnetic form factors containing precise information on the nuclear structure. We study the sensitivity of the magnetic form factors to structural effects related to the evolution and shape transitions in both isotopic and isotonic chains. Calculations of magnetic form factors are performed in the plane-wave Born approximation. The nuclear structure is obtained from a deformed self-consistent mean-field calculation based on a Skyrme HF+BCS formalism. Collective effects are included in the cranking approximation, whereas nucleon-nucleon correlations are taken into account in the coherent density fluctuation model. The evolution of the magnetic form factors is found to exhibit signatures of shape transitions that show up in selected isotopic and isotonic chains involving both stable and unstable nuclei. Several cases are identified as suitable candidates for showing such fingerprints of shape transitions. A new generation of electron scattering experiments involving electron-radioactive beam colliders will be available in the near future, leading to a renewed interest in this field.
