Fragmentation dynamics of sulfur dioxide dication in intense femtosecond laser fields
Abstract
We present an experimental study on the fragmentation dynamics of sulfur dioxide (SO2) under femtosecond laser irradiation. Using the fragment ions coincidence momentum imaging technique, two two-body and one three-body fragmentation channels of SO22+ are analyzed. For the three-body channel, four different dissociation mechanisms are determined unambiguously by analyzing the kinetic energy and momentum correlations, Dalitz plots, and the native frame maps. In addition to the concerted and conventional sequential fragmentation paths, a novel three-body fragmentation pathway, defined as an isomerization pathway, was identified, in which a rapidly rotating O2+ molecular ion is formed prior to fragmentation into individual fragments. This new fragmentation mechanism may provide new insights to explain the abiotic oxygen production in SO2-dominated planetary atmospheres.
Article Details
Journal Info
The Journal of Chemical Physics
American Institute of Physics
Authors (14)
Ruichao Dong
Shanghai Advanced Research Institute, Chinese Academy of Sciences 1 , Shanghai 201210,
Ahai Chen
Center for Transformative Science and School of Physical Science and Technology, ShanghaiTech University 3 , Shanghai 201210,
Yikang Zhang
Jinze Feng
Center for Transformative Science and School of Physical Science and Technology, ShanghaiTech University 3 , Shanghai 201210,
Huanyu Ma
Center for Transformative Science and School of Physical Science and Technology, ShanghaiTech University 3 , Shanghai 201210,
Tuo Liu
Yuneng Shen
Center for Transformative Science and School of Physical Science and Technology, ShanghaiTech University 3 , Shanghai 201210,
Jiaming Jiang
Center for Transformative Science and School of Physical Science and Technology, ShanghaiTech University 3 , Shanghai 201210,
Zhenjie Shen
Center for Transformative Science and School of Physical Science and Technology, ShanghaiTech University 3 , Shanghai 201210,
Xiaoqing Hu
Enliang Wang
James R. Macdonald Laboratory, Physics Department
Xiangjun Chen
Xincheng Wang
Center for Transformative Science and School of Physical Science and Technology, ShanghaiTech University 3 , Shanghai 201210,
Yuhai Jiang
Shanghai Advanced Research Institute, Chinese Academy of Sciences 1 , Shanghai 201210,