Author/Authors :
Okino، نويسنده , , Tomoya and Furukawa، نويسنده , , Yusuke and Liu، نويسنده , , Peng and Ichikawa، نويسنده , , Takayuki and Itakura، نويسنده , , Ryuji and Hoshina، نويسنده , , Kennosuke and Yamanouchi، نويسنده , , Kaoru and Nakano، نويسنده , , Hidetoshi، نويسنده ,
Abstract :
Two-body Coulomb explosion processes of methanol (CH3OH, CD3OH, CH3OD) in an intense laser field (0.2 PW/cm2, 60 fs) are investigated by the coincidence momentum imaging method. The dissociation pathways with hydrogen/deuterium migration or hydrogen/deuterium exchange prior to the C–O bond breaking are securely identified. From the anisotropic angular distributions and the relative yields of the fragment ions, it is revealed that the hydrogen migration process is terminated within the period of an intense ultrashort laser pulse. A comparison of the results obtained for CH3OH and those for the isotopomers shows that the hydrogen migration is decelerated by the isotope substitution.
