Efficient ejection of H3+ from hydrocarbon molecules induced by ultrashort intense lalifeser fields

The ejection processes of hydrogen molecular ion H-3(+) from 12 kinds of hydrocarbon molecular species, methanol, ethanol, 1-propanol, 2-propanol, acetone, acetaldehyde, methane, ethane, ethylene, allene, 1,3-butadiene, and cyclohexane, induced by intense laser fields (similar to 10(14) W/cm(2)) have been investigated by time-of-flight mass spectroscopy. The observation of the H-3(+) production with the kinetic energy range of 3.5-5.0 eV from doubly ionized ethylene, allene, 1,3-butadiene, and cyclohexane, which have no methyl groups, showed the existence of the ultrafast hydrogen migration processes that enables three hydrogen atoms to come together to form H-3(+) within a hydrocarbon molecule. (c) 2008 American Institute of Physics.