发表机构
Tata Institute of Fundamental Research（塔塔基础研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究利用COLTRIMS测量了H⁺和H₂⁺与H₂碰撞中的小角散射，观察到基态通道的夫琅禾费衍射，并用简单模型重建了圆孔状散射中心。
AI 中文摘要
我们利用冷靶反冲离子动量谱学（COLTRIMS）技术，测量了在5、7.5和10 keV/u能量下，[H⁺ + H₂]和[H₂⁺ + H₂]碰撞中非解离态单电子俘获的态选择散射角分布。在我们的测量中，散射角范围较小，预期会发生衍射效应，并且基态电子俘获——对于H₂⁺弹丸为对称共振通道，对于H⁺弹丸为近共振通道——与其他通道完全分辨开来。我们考虑到H₂⁺和H₂具有两个独立且相同的散射中心，并表现出多中心干涉效应，对数据进行了分析。通过比较这些等速度碰撞，我们研究了单个散射中心的原子性质。对于两种弹丸，在基态通道中，我们观察到来自圆孔状图案的夫琅禾费衍射，且条纹宽度相等。我们应用了一个简单的玩具模型来重建这些圆孔。
英文摘要
We measured state selective scattering angle distributions in non-dissociative-state single electron capture in $\lbrace 5, 7.5, 10\rbrace$ keV/u, $\left[\mathrm{H^+ + H_2}\right]$ and $\left[\mathrm{H_2^+ + H_2}\right]$ collisions, using Cold Target Recoil Ion Momentum Spectroscopy (COLTRIMS). In our measurements, range of the scattering angle was small where diffraction effect is expected to take place, and, the ground state electron capture - symmetrical resonant channel for the $\mathrm{H_2^+}$ projectile and near resonant channel for the $\mathrm{H^+}$ projectile - was fully resolved from other channels. We analyzed the data considering $\mathrm{H_2^+}$ and $\mathrm{H_2}$ possess two independent-identical scattering centers and exhibit multi center interference effect. By comparing these equal-velocity collisions, we investigated the atomic nature of the individual scattering centers. We observed Fraunhofer diffraction from a circular aperture like patterns with equal fringe widths, for both the projectiles, in ground state channel. We applied a simple toy model to reconstruct the circular apertures.
