標題: Advantage of spatial map ion imaging in the study of large molecule photodissociation
作者: Lee, Chin
Lin, Yen-Cheng
Lee, Shih-Huang
Lee, Yin-Yu
Tseng, Chien-Ming
Lee, Yuan-Tseh
Ni, Chi-Kung
應用化學系
Department of Applied Chemistry
公開日期: 7-七月-2017
摘要: 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.
URI: http://dx.doi.org/10.1063/1.4975671
http://hdl.handle.net/11536/147850
ISSN: 0021-9606
DOI: 10.1063/1.4975671
期刊: JOURNAL OF CHEMICAL PHYSICS
Volume: 147
顯示於類別:期刊論文