Ejection of triatomic molecular ion H3+ from methyl chloride in an intense femtosecond laser field

Angular anisotropy of H3+ ejection has a stronger dependency on the laser intensity than the 35Cl+ ejection. Competition between Coulomb explosion channels with H3+ and 35Cl+ ejection at different laser intensity shows 35Cl+ ejection is always the dominant channel. Both non-sequential and sequential double ionization occur and it is implied that CH335Cl2+ prepared by non-sequential double ionization is more likely to dissociate. A simple schematic is proposed to illustrate the laser intensity dependence of the H3+ ejection fragment anisotropy.85