Abstract
Two-body Coulomb explosion processes of ethane (CH3 CH3 ) and its isotopomers (CD3 CD3 and CH3 CD3 ) induced by an intense laser field are investigated by a coincidence momentum imaging method. From the yield ratios of H3 + , H2 D+ , HD2 + , and D3 + ejected from CH3 CD3 + induced by an ultrashort-pulsed intense laser field, nearly statistical randomization of H and D atoms called hydrogen atom scrambling was identified.
Highlights
When hydrocarbon molecules are exposed to an intense laser field, a variety of dynamical processes originating from ultrafast motion of hydrogen atoms proceed such as ultrafast hydrogen migration and ejection of H3+, as has been shown in our recent studies on methanol [1], ethane [2,3,4], and other hydrocarbon molecules [2]
In order to clarify how hydrogen atoms and/or protons migrate within an ethane molecule and to what extent the hydrogen atoms and protons exchange their positions among each other, we measured coincidence momentum imaging maps of fragment ions produced from ethane exposed to an intense laser field
+ 3 ions generated through CH3CD32+ → CH3+ + CD3+ with respect to the laser polarization vector
Summary
When hydrocarbon molecules are exposed to an intense laser field, a variety of dynamical processes originating from ultrafast motion of hydrogen atoms proceed such as ultrafast hydrogen migration and ejection of H3+, as has been shown in our recent studies on methanol [1], ethane [2,3,4], and other hydrocarbon molecules [2]. In order to clarify how hydrogen atoms and/or protons migrate within an ethane molecule and to what extent the hydrogen atoms and protons exchange their positions among each other, we measured coincidence momentum imaging maps of fragment ions produced from ethane exposed to an intense laser field
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