Doubly differential spectra of scattered protons in ionization of atomic hydrogen
Doubly differential spectra of scattered protons in ionization of atomic hydrogen
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原子氢电离中散射质子的双微分光谱
DOI：
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发表时间：
2010
期刊：
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通讯作者：
A. LaForge
中科院分区：
文献类型：
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作者：
A. LaForge
我们测量和计算了75 kev质子冲击下原子氢电离的双微分截面作为散射角的函数。该碰撞系统代表了一个纯粹的三体系统，从而提供了对少体动力学理论描述的准确测试，而没有多电子目标中电子相关所带来的任何复杂性。实验与几种理论模型的比较表明，弹丸-靶核相互作用最好用跃迁幅度的二阶算子来描述。另一方面，弹丸-电子相互作用中的高阶贡献在末态波函数中得到了更恰当的解释。
We have measured and calculated doubly differential cross sections for ionization of atomic hydrogen using 75-keV proton impact for fixed projectile energy losses as a function of scattering angle. This collision system represents a pure three-body system and thus offers an accurate test of the theoretical description of the few-body dynamics without any complications presented by electron correlation in many-electron targets. Comparison between experiment and several theoretical models reveals that the projectile-target nucleus interaction is best described by the operator of a second-order term of the transition amplitude. Higher-order contributions in the projectile-electron interaction, on the other hand, are more appropriately accounted for in the final-state wave function.