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Advantage of spatial map ion imaging in the study of large molecule photodissociation

机译:空间地图离子成像在大分子光度分子研究中的优势

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The original ion imaging technique has low velocity resolution, and currently, photodissociation is mostly investigated using velocity map ion imaging. However, separating signals from the background (resulting from undissociated excited parent molecules) is difficult when velocity map ion imaging is used for the photodissociation of large molecules (number of atoms >= 10). In this study, we used the photodissociation of phenol at the S-1 band origin as an example to demonstrate how our multimass ion imaging technique, based on modified spatial map ion imaging, can overcome this difficulty. The photofragment translational energy distribution obtained when multimass ion imaging was used differed considerably from that obtained when velocity map ion imaging and Rydberg atom tagging were used. We used conventional translational spectroscopy as a second method to further confirm the experimental results, and we conclude that data should be interpreted carefully when velocity map ion imaging or Rydberg atom tagging is used in the photodissociation of large molecules. Finally, we propose a modified velocity map ion imaging technique without the disadvantages of the current velocity map ion imaging technique. Published by AIP Publishing.
机译:原始离子成像技术具有低速分辨率,目前具有低速分辨率,主要使用速度映射离子成像来研究光探测。然而,当速度图离子成像用于大分子(原子数> = 10)时,将来自背景的信号从背景中分离(由未加工的激发母体分子产生)是困难的。在这项研究中,我们在S-1带源处使用了苯酚的光积极作为示例,以证明我们的多摩卡离子成像技术如何基于修改的空间地图离子成像,可以克服这种困难。当使用多屠杀离子成像时获得的光折叠平移能量分布在速度映射离子成像和rydberg原子标记时得到的显着不同。我们使用常规的平移光谱作为第二种方法来进一步证实实验结果,我们得出结论,当速度映射离子成像或rydberg原子标记用于大分子的光解体时,应仔细解释数据。最后,我们提出了一种改进的速度映射离子成像技术,而没有当前速度映射离子成像技术的缺点。通过AIP发布发布。

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