What is the significance of the spin–orbit coupling in the dissociative photoionization of methyl iodide (CH3I)?

Label:chem

Topic
The study highlights the importance of spin–orbit coupling in the dissociative photoionization of methyl iodide (CH3I), particularly in locating the elusive conical intersection and understanding the internal conversion process.

From: "Evidencing an elusive conical intersection in the dissociative photoionization of methyl iodide", Chemical Science, Volume 15, Issue 9, 28 February 2024, Pages 3203-3213
Answer
The spin–orbit coupling is significant as it allows for the identification of the elusive conical intersection and mediates the internal conversion process, leading to the formation of methyl ions (CH3+).
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